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Initial impressions RPi vs uRendu

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Posted on March 11, 2017 at 12:50:51
E-Stat
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 I am comparing they two streamers upstairs in the main system as following:

Pi 3B with HifiBerry Digi+ Jameco 1A 5V linear PS via DH Labs optical to ARC DAC8
uRendu HDPlex 2A 7V linear PS thru Audiophilleo 2 USB converter to BNC on ARC DAC8

I could have used the coax out on the RPi and an RCA to BNC connector, but the above arranement allowed for only swapping the Ethernet cable.

I'll cut to the chase - the RPI is a phenomenally good bargain and doesn't miss that much as compared with the more expensive uRendu setup. And, it could be that I'm hearing mostly power supply differences. Perhaps I'll need to reconfigure the HDPlex for 5V operation as another variable.

What I'm hearing for the most part is more dynamic impact and emotion with the uRendu. I'm listening to the opening tracks from the soundtrack to Fanstastic Beasts and Where to Find Them. There's great bass drum slam with a very realistic sense of its air wafting through the hall. Fine percussion is ever so slightly better delineated with the uRendu along with a greater sense of sustain from the harmonics with upper percussion like the triangle.

It seems I'm always a bit late to the party, but I can positively say that now I get it about this cute little box. FWIW, I did take Soundchekk's suggestion and configured the buffers for 20k and 600k which means it's pretty much playing from memory as opposed to streaming.

Wifey's out of town this weekend, so I'm gonna do lots of comparative listening. I want to compare voice, piano and complex synth content to get a full measure of other character differences.

Stay tuned!

 

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RE: Initial impressions RPi vs uRendu, posted on March 16, 2017 at 19:04:11
justdavid
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After reading all this,
I've determined I like the rpi3
Because of the Lego case option.

 

There you go!, posted on March 17, 2017 at 08:53:31
E-Stat
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 You could mount figures of your favorite super heroes on top. :)

 

I'm intrigued, posted on March 15, 2017 at 16:34:03
PaulN
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 by these micro servers/renderers but I'm still on the fence. I'd be more inclined to buy a rendu than cobble together a Pi and the supercapacitor supply very much intrigues me. But that $1000 could instead go other places in my system, such as some vinyl tweaks and/or an Okki Noki record cleaner. I just have a hard tiume accepting that the rendu is going to make much of a difference over my direct connection from my imac via usb. I could even try an hdmi connection as my DAC has an input. It's like Peter Belt (RIP) is offering me a magic alarm clock and green pens all over again. Did they help? Maybe. But so do a lot of other things that cost less and possibly render a higher value for the improvements. IDK. It would be easier if the rendu was half it's current price.

 

RE: I'm intrigued, posted on March 16, 2017 at 18:56:39
Ivan303
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"I just have a hard tiume accepting that the rendu is going to make much of a difference over my direct connection from my imac via usb."

Not sure it needs to in order to be a viable solution. OTOH, I've known John Swenson for quite a long while and would bet that it does, at least when compared to my MacBook Air.

I can stream QOBUZ, TIDAL and play ripped CDs from any computer in the house, as long as I have a DAC nearby.

But with the uRendu, all I need is an Ethernet jack and a USB DAC and I'm in business, no laptop needed.

IF you intend to put your music on a NAS drive and have a decent Ethernet LAN in you house, it might be the way to go.

For myself, I use SONOS in about every room but for $100+ and a bit of work, the HiFi Berry Raspberry Pi solution might have some merit. I really like the idea of getting computers out of my music system and back in the office where they belong.

Plus it would give me a chance to find out if my brain is capable of dealing with technical issues at this late date.






First they came for the dumb-asses
And I did not speak out
Because I was not a dumb-ass

 

RE: I'm intrigued, posted on March 16, 2017 at 04:07:12
Dynobot
 The choice is yours.

Cobble something together ie Flash a SD-card and insert a RPi inside a case -or- buy a $600 unit with it already done.

If the RPi scenario is too labor intensive, then just go with the uRu and don't look back.

As it stands the uRu seems to be just slightly better even with $1k+ extra peripherals [HDPlex PS + Converter].

Choices Choices....

 

RE: I'm intrigued, posted on March 16, 2017 at 07:49:20
AbeCollins
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As it stands the uRu seems to be just slightly better even with $1k+ extra peripherals [HDPlex PS + Converter].

It may sound slightly better even without the extra $1K in goodies. That just happens to be E-Stat's setup because he happens to have the HDPlex PS and his DAC requires the USB/SPDIF converter.

I haven't heard this comparison but I wouldn't be too surprised if the RPi were JUST AS GOOD sonically. I'm the one who has been preaching for years that from a practical perspective the DAC is significantly more important in influencing the sonic character of the system vs whatever is feeding it.... PC/Mac/Linux/Windows/MacOS/CD transport or a network streamer. Of course this assumes that the source is at least reasonably well thought out and decent. Obviously not a popular view given all the effort folks put into their source. I'm guilty of that too but not to any extreme measure.




 

It will be interesting to read Steve's upcoming evaluation, posted on March 16, 2017 at 12:18:11
E-Stat
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 between the Sonore Signature, UpTone Audio UltraCap LPS-1, HDPlex 100w, and Fidelizer Nikola LPS.

While some find my HDPlex 2A power supply overkill (uRendu requires only 1A), the Nikola delivers 6.4A and the Sonore Signature, a whopping 12A!

Philosophically, I'm in the Ultracap camp given its clever approach. I wish that unit was available last summer when I had to make a decision.

 

RE: It will be interesting to read Steve's upcoming evaluation, posted on March 16, 2017 at 16:33:14
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 Allow me to correct some information about power supply output.

1. HDPlex never made dedicated 2A for 7V output. That'll mean they use 15VA transformer and I can't find such products in their website. They may use 100VA transformer and regulate 7V output with 2A for current limit. That's one possibility.

2. Having more reserved power in transformer is generally better. When you use 1A, you should have transformer capable of sending 2A at least for optimal performance. Using transformer with maximum limit is dangerous to equipment due to chance of insufficient power.

3. 6.4A for 7V output is from calculation of what Nikola can send for 7V output with 45VA transformer. It's also possible to build 36VA for 12V and 9VA for 7V making 3A@12V and 1.28A@9V too.

HDPlex actually uses 100VA of differnt transformer type which is more than double of Nikola ultra low noise toroidal transformer.

I came here to provide knowledge about power supply usage and I believe every products has its own uses for different market. Some also use LPS-1 together with HDPlex and Nikola too for high quality two step-regulation design. :)

Regards,
Keetakawee

 

Ok, posted on March 16, 2017 at 16:49:45
E-Stat
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 They may use 100VA transformer and regulate 7V output with 2A for current limit.

That is the stated specification for that leg. The voltage is variable from 5V to 19V.

HDPlex actually uses 100VA of differnt transformer type which is more than double of Nikola ultra low noise toroidal transformer.

Yes, the HDPlex uses an R-core transformer instead. Which is what Audio Research has been using in lieu of toroidals for slightly over ten years. Both my DAC and preamp use that type.

 

RE: Ok, posted on March 16, 2017 at 22:23:01
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 Normally, it's ideal to have output from transformer about the same regulated output. Maybe little less or above depending out voltage level.

Nikola uses different transformer outputs for matching requested output voltage. If you order 7V from us, we'll use transformer with different output from 12V model.

R-Core transformer is often used in analog equipment for high current output with more power in compact size. I haven't seen any company producing highend digital equipment using R-core transformer though.

Toroidal transformer is often used in digital equipment for linear power supply. For example, Esoteric uses that for every models. Other highend companies producing digital equipment like dCS/Emm Labs will use switching power supply as an alternative.

To get the same power output using toroidal transformer, it'll be bigger than R-core. Since you seems interested in HDPlex product, I won't comment further about its design principles as that isn't appropriate in my position to say more than that.

Regards,
Keetakawee

 

Ok, posted on March 17, 2017 at 06:37:21
E-Stat
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 R-Core transformer is often used in analog equipment for high current output with more power in compact size.

Actually, Audio Research implements them in low current line level devices like the REF 2 Phono and DAC9 for audio stages while using conventional transformers for relays, display and microprocessor controls. Both my older DAC8 and SP20 use them as well. While you frequently see power amps using toroidals, I can't recall ever seeing one using an R-core.

FWIW, the HDPlex unit recommended by Sonore uses but one transformer in its design.

I find it ironic that others seem to disagree with this statement of yours: "When you use 1A, you should have transformer capable of sending 2A at least for optimal performance."

I was castigated by one inmate for using a 2A power supply for the uRendu: "It is not 'optimal' for powering a device needing only a fraction of the current."

 

RE: Ok, posted on March 17, 2017 at 06:41:23
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 You're misunderstanding something here. HDPlex builds PSU with 100VA r-core transformer. I built PSU with 45VA toroidal transformer. I can limit 1A current for 7V too using 45 or even 160VA transformer. That's my point.

Well, everyone has their own design principles. I can share my knowledge but I won't debate about R-Core vs Toroidal for digital audio equipment.

It's my design principles from my experience with ultra highend digital sources like Esoteric/dCS/Emm Labs/Weiss and so many others that use toroidal if not switching PSU.

 

RE: Ok, posted on March 17, 2017 at 07:26:34
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 Is that necessarily better?
: It's not about being better. My point is you can't treat 2A@7V from 100VA transformer being more over kill than 6.4A@7V from 45VA transformer. Being over kill or not isn't about current output but transformer size.

I can also order 45VA transformer with 38VA for primary output and 7VA for secondary output. That'll have 3A@12V and 1A@7V. Is that still kill? That's my point of the first discussion.

Emulate whoever you choose!
: I didn't emulate anyone for building Nikola. As I said, all ultra highend digital sources in market will use either switching PSU or linear PSU with toroidal transformer. I haven't seen any $30k equipment or higher using any other transformer but toroidal at that price. Not even once.

Also, Nikola is designed with only one voltage as specialized product. HDPlex is designed with 5-19V and multiple outputs as multi-purposes product.

 

RE: Ok, posted on March 17, 2017 at 09:05:15
E-Stat
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 Being over kill or not isn't about current output but transformer size.

Really? Some electronics, like the uRendu will shut down if it draws too much current. On the other hand, I've never heard of any doing so because it somehow "detects" a larger transformer upstream running at low capacity. Have you?

HDPlex is designed with 5-19V and multiple outputs as multi-purposes product.

Yes. For fewer dollars.

 

RE: Ok, posted on March 17, 2017 at 10:04:46
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 Really? Some electronics, like the uRendu will shut down if it draws too much current.

: There's no such thing as drawing too much current from over supplied source, only the opposite when power source couldn't maintain stable current draw.

microRendu accepts 6-9VDC input from regulated from power supply. If it shutdowns, it has power supply issue. That's the faulty in design not having too large transformer.

When you regulate 5-7V from large transformer with way higher output voltage like 15-19V. That'll generate a lot of heat more than smaller transformer with the same output voltage. That's the only possibility where larger transformer can get worse from least optimal design to save the cost.

From what I checked on HDPlex, its 100W transformer has 20V and 15V output. I'm not sure which one used for regulating 5-19V but both will be too high for 7V output. For VRMS of 15V times 1.414 is 21V, dropping it down to 1/3 at 7V will have a lot of heat with energy lost from conversion. Comparing to transformer using 7V output, that'll be about 10V for VRMS, ideal voltage for regulating 7V output.

On the other hand, I've never heard of any doing so because it somehow "detects" a larger transformer upstream running at low capacity. Have you?

: I've heard my friend's diy preamp spending $6k on PSU alone with two transformers large enough to build power amp instead. He uses about 20 diodes costing about $20 each based on borbely's bufferless design. Sounds awesome to my ears and very live with full sound performance.

There's people who build very large transformer despite using not so many power because it works better on circuit is designed for more reserved power. Most power amps with double power rating from 8 to 4 ohm often has large transformer for higher reserved power too.

Yes. For fewer dollars.
: Why don't you buy Rasberry PI instead? It has more features than microRendu and cheaper too. Aren't you buying microRendu for better qualities though it has less features?

I'm building affordable highend linear power supply for those who can appreciate it. I answered your questions out of good will to help you correcting your misunderstanding about electronics not promoting my products. If you think HDPlex is good for you, go for it. You asked for knowledge about power supply and here I am giving you my knowledge.

Regards,
Keetakawee

 

RE: Ok, posted on March 17, 2017 at 11:08:22
E-Stat
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 There's no such thing as drawing too much current from over supplied source...

Sure there can be when a component like a uRendu is also powering an attached USB device the sum of which may exceed its design criteria.

That's the faulty in design not having too large transformer...on PSU alone with two transformers large enough to build power amp instead. ...Sounds awesome to my ears and very live with full sound performance.

This is what I have been saying.

Why don't you buy Rasberry PI instead? It has more features than microRendu and cheaper too.

I own both and find the sound quality of the uRendu superior out of the box.

You asked for knowledge about power supply

There are no questions to be found in my post where you began the conversation. And yes, your blinding flash of the obvious about the HDPlex:

"They may use 100VA transformer and regulate 7V output with 2A for current limit. That's one possibility."

is correct. :)

 

RE: Ok, posted on March 17, 2017 at 11:18:09
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 Of course there is when that component is also powering a USB attached
device which may exceed the sum of the component's design criteria.
Apparently, you do not understand how the uRendu is implemented with USB
DACs. Perhaps you might read the caution

https://uptoneaudio.com/products/ultracap-lps-1

: This is issue from drawing current exceeding the limit from power source. Not the issue from increasing transformer power. You should also consider that LPS-1 has 1.1A current draw limit which is hardly sufficient for microRendu. Ultracap is like capacitor bank design leveraging current surge from output and give passive power reservation from capacitor. For microRendu, LPS-1 isn't optimal choice to power devce with 1A current rating. It's OK for most USB Audio inputs and SSD but not for mini PC like microRendu.

Well it's up to you. I'm talking from past experience with LPS-1 with my customers. It could be that limiting to 1.1A is to prevent damaging unit from getting too hot from high current. Some designs like shunt regulator will easily get hot and we couldn't test this design with Nikola too.

"That's the faulty in design not having too large transformer...on PSU
alone with two transformers large enough to build power amp instead.
...Sounds awesome to my ears and very live with full sound
performance."

This is what I have been saying.

: That's the issue of faulty design. They shouldn't use high voltage output to regulate low voltage current in the first place. For matching output voltage from transformer, it only gets better.

"Why don't you buy Rasberry PI instead? It has more features than
microRendu and cheaper too."

I own both and find the sound quality of the uRendu superior out of the
box.

: I wonder what leads you to decide to own microRendu before listening to it. Won't you feel skeptics against microRendu before trying or buying?

"will to help you correcting your misunderstanding about electronics"

I haven't misspoken about anything.

: From the beginning, you said this.

"While some find my HDPlex 2A power supply overkill (uRendu requires only 1A), the Nikola delivers 6.4A and the Sonore Signature, a whopping 12A!"

There's nothing wrong for power source being able to provide current more than device needs. There's no demerits in that and 2A output on device requiring 1A isn't over kill at all. Don't believe them. For every linear power supply design, you should at least use adaptor with double current limit. Unlike switching, they tends to have voltage drop easier and increasing power source will reduce voltage drop rate.

If you have 1A rating for switching power supply, you should double it to 2A for linear power supply. That's bare minimum to keep linear power supply working properly. That's your misunderstandings.

So I'm correcting these misconceptions floating around before more people starting to adopt impractical products. Last night, I tested LPS-1 with Seagate Freeagent USB drive. It has less than 1A for power rating on hard drive yet LPS-1 keeps cutting power source because of power surge above 1.1A limit. Using ultracap can prevent power surge issue but that's workaround for using products incorrectly.

Regards,
Keetakawee

 

RE: Ok, posted on March 17, 2017 at 11:27:00
E-Stat
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 This is issue from drawing current exceeding the limit from power source.

Exactly! I'm glad you now concur. Remember what you said earlier?

"There's no such thing as drawing too much current from over supplied source"

There's nothing wrong for power source being able to provide current more than device needs.

I truly admire folks who are multi-lingual, but clearly something is getting lost in the translation. When I used the term "while some find" - that means other people, not me. Do you remember how I originally responded to that?

I find it ironic that others seem to disagree with this statement of yours: "When you use 1A, you should have transformer capable of sending 2A at least for optimal performance."

Not me. :)

So I'm correcting these misconceptions floating around

As voiced by others, not me Tonto!








 

RE: Ok, posted on March 17, 2017 at 11:39:56
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 "There's no such thing as drawing too much current from over supplied source"

: I mean increasing transformer output power can't make device drawing too much current. Remember what you said before? We're talking about increasing transformer output power and you brought up topic about microRendu having current draw issue. That's not related to increasing transformer output power at all, right?

"I truly admire folks who are multi-lingual, but clearly something is getting lost in the translation. When I used the term "while some find" - that means other people, not me. Do you remember how I originally responded to that?"

: You also said this.

"Philosophically, I'm in the Ultracap camp given its clever approach. I wish that unit was available last summer when I had to make a decision."

It's not safe to use LPS-1 with microRendu. If devic requires 1 Amp min continuous, using power source with 1.1A max current is not wise at all. That's why I stepped in to correct your misunderstandings before you actually buy it.

"I find it ironic that others seem to disagree with this statement of yours: "When you use 1A, you should have transformer capable of sending 2A at least for optimal performance."

Not me. :)"

: I believe people who understand the nature switching and linear power supply specifications will agree with me. But OK. People can have different principles and choose what they like.

But if you believe in your way of doing things, go ahead. I hope you won't regret this later.

Regards,
Keetakawee

 

RE: Ok, posted on March 17, 2017 at 11:53:37
E-Stat
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 I mean increasing transformer output power can't make device drawing too much current

No, the attached device would be the villain in this case drawing more current than its host can digest.

That's not related to increasing transformer output power at all, right?

Certainly not. While I find having some added current capability is desirable, having six to twelve times the needed value as you find with the Nikola or the Sonore Signature sure seems like overkill.

It's not safe to use LPS-1 with microRendu.

Do you realize the same engineer (John Swenson) designed both - with the LPS-1 intended to power the rendu? While the nominal current requirement for the rendu supply is 1A, the device itself draws about half that.

That's why I stepped in to correct your misunderstandings before you actually buy it.

We still seem to face a translation challenge here. Here's my observation once again:

Philosophically, I'm in the Ultracap camp given its clever approach.

That clever approach being of using low impedance capacitors to drive the device sourced by an "energizing source".

And I may be wrong, but somehow I think that Mr. Swenson has a much deeper understanding of how his products work together than do you. And that using them together is most certainly not "dangerous". :)

edit: perhaps you might want to read his design goals and explanation of how the unit works by clicking here.

 

RE: Ok, posted on March 17, 2017 at 12:22:30
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 "No, the attached device would be the villain in this case drawing more current than its host can digest."

: The more reason you should increase output on power supply host to prevent such issue from happening.

"Certainly not. While I find having some added current capability is desirable, having six to twelve times the needed value as you find with the Nikola or the Sonore Signature sure seems like overkill."

: Define overkill. For me it's not overkill at all but it's understandable for R-Core lover's point of view who don't appreciate increasing transformer's output power.

"Do you realize the same engineer (John Swenson) designed both - with the LPS-1 intended to power the rendu? While the nominal current requirement for the rendu supply is 1A, the device itself draws about half that."

: I do realize and for me it's not safe since it can't even power JCAT USB Card with a single USB hard drive from Seagate (it's already low powered drive among 2.5 HDD). That's my opinion like some people who don't think bypassing fuse is OK but some do. If microRendu states it requires 1A continuous current, it'll be 2A linear power supply in my book for safety reasons.

"
That clever approach being of using low impedance capacitors to drive the device sourced by an "energizing source".

And I may be wrong, but somehow I think that Mr. Swenson has a much deeper understanding of how his products work together than do you. And that using them together is most certainly not "dangerous". :)"

: There's nothing wrong with LPS-1 product itself. However, with LPS-1 having 1.1A current limit, I don't feel safe to power device requiring 1A continuous current even if developer said it's OK.

I recommended LPS-1 to my customer myself with intention to power USB audio input alone. I believe microRendu can work with LPS-1 for most of the time but I don't feel safe with 1A "continuous" device powered by 1.1A linear power supply.

Also, I agree about we're having communications issues in one way or another. Here's what you said before:

"Being over kill or not isn't about current output but transformer size.

Really? Some electronics, like the uRendu will shut down if it draws too much current. On the other hand, I've never heard of any doing so because it somehow "detects" a larger transformer upstream running at low capacity. Have you?"

I interpreted this as using overkill power supply can make uRendu shutting down because it draws too much current. And you agreed with me that this shutting down issue has nothing to do with increasing transform output power. Even now, I still have no idea why you brought uRendu drawing too much current up for this off-topic comment.

Also, universal energized power supply is switching AC>DC using low impedance capacitor for additional $15. If you're familiar with two-step regulation, you can use Nikola for the first step and LPS-1 for the second step like some of my customers too for future upgrades.

Regards,
Keetakawee

 

RE: Ok, posted on March 17, 2017 at 12:37:06
E-Stat
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 The more reason you should increase output on power supply host to prevent such issue from happening.

Somehow I'm thinking that deliberately overheating a device beyond its design criteria is not a good idea.

However, with LPS-1 having 1.1A current limit, I don't feel safe to power device requiring 1A continuous current even if developer said it's OK.

Given it has 60 farads of storage, I don't share you concern.

it can't even power JCAT USB Card with a single USB hard drive from Seagate

I think you'll find it was never intended to do that. If you return to my previous link, the intended uses don't include spinning rust drives. SSDs, yes.

I interpreted this as using overkill power supply can make uRendu shutting down because it draws too much current.

Perhaps I wasn't clear. Just to suggest such is unnecessary. We had a side topic going on about the possibility of at attached USB device drawing more current than the rendu is comfortable with, i.e. not burn itself up.

Also, universal energized power supply is switching AC>DC using low impedance capacitor for additional $15. If you're familiar with two-step regulation, you can use Nikola for the first step and LPS-1 for the second step.

I'm thinking you don't understand how the two interact. The clever approach to which I previously referred is that the quality of energizer itself doesn't affect the resulting noise output by the supercaps feeding the device.

Sure, you could throw money away, but that would not be my choice.

 

RE: Ok, posted on March 17, 2017 at 12:47:04
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 "Somehow I'm thinking that deliberately overheating a device beyond its design criteria is not a good idea."

: It'll overheat if you use 15V output transformer to regulate 7V. It won't overheat at all if you use 7V output transformer to regulate 7V and also sound much better too.

It's not the fault of raising transformer output power but fault in choosing improper output voltage. I can't see the reason why you should keep using way "overkill" and "least optimal" output voltage like that.

"Given it has 60 farads of storage, I don't share you concern."

: If device doesn't take more than 1A at all, that's OK. Capacitor bank design will work fine as long as device doesn't actually draw more than the limit.

"Perhaps I wasn't clear. Just to suggest such is unnecessary. We had a side topic going on about the possibility of at attached USB device drawing more current than the rendu is comfortable with, i.e. not burn itself up."

: I agree that wasn't clear and should be stated in other areas outside increasing transformer output power. Glad to see we're clear about this now.

"I'm thinking you don't understand how the two interact. The elegant design to which I previously referred is that the quality of energizer itself doesn't affect the resulting noise output by the supercaps feeding the device.

Sure, you could throw money away, but that would not be my choice."

: I'm thinking you don't understand at all about AC>DC and DC>DC approach for two step regulation. energized supply is switching PSU which is better than standard switching PSU found in computer market. OK it has low impedance capacitor and can send current fast with good switching design to work with capacitor bank in LPS-1 more effectively. I can see it's effective and very valuable for additional $15.

Sure it's better than cheap switching PSU and if believing that will not get any better with LPS-1 can give your peace of mind, OK. But this is not true for my customer's case using LPS-1 for audio works.

Sure it's your choice and your belief and I respect that. I hope you'll be happy with uRendu and LPS-1.

Regards,
Keetakawee

 

RE: Ok, posted on March 17, 2017 at 13:02:57
E-Stat
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 If device doesn't take more than 1A at all, that's OK.

Perhaps you didn't note where I previously observed that while the nominal requirement is 1A, the device itself consumes about half that.

It goes back to your incomplete understanding about the device and its maker's year long vision working together with the uRendu.

Sure it's better than cheap switching PSU and if believing that will not get any better with LPS-1 can give your peace of mind, OK.

You're welcome to argue the merits of your claim with John Swenson since that is his assertion.

I hope you'll be happy with uRendu and LPS-1.

At the expense of confusing the issue with facts, I don't have one nor have a ready plan to sell the HDPlex and replace it with the LPS-1.

Which returns to exactly where we started. I remain curious as to Steve's observations as to how the two compare.

Good day - I'm ready to listen to some music!

 

RE: Ok, posted on March 17, 2017 at 13:22:51
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 "Perhaps you didn't note where I previously observed that while the nominal requirement is 1A, the device itself consumes about half that.

: And perhaps you didn't note where I previously mentioned that it's about reasoning based on specifications as I stated before here.

'I do realize and for me it's not safe since it can't even power JCAT USB Card with a single USB hard drive from Seagate (it's already low powered drive among 2.5 HDD). That's my opinion like some people who don't think bypassing fuse is OK but some do. If microRendu states it requires 1A continuous current, it'll be 2A linear power supply in my book for safety reasons.'

And not to mention additional power consumption for micro SD and some USB audio chipset that may draw current significantly like 300-500mA for playing hires format with uRendu drawing 1A in total.

"It does back to your incomplete understanding about the device and its maker's year long vision working together with the uRendu."

: You neglected the possibility of uRendu + USB input that may not work in some cases. I've been testing USB DACs in market for over 5 years before releasing Nimitra and I'm sure I haven't tested enough yet. This starts to get offensive now and I don't appreciate that.

"You're welcome to argue the merits of your claim with John Swenson since that is his assertion."

: Your assertion is 'Sure, you could throw money away, but that would not be my choice.' I have nothing to argued with $15 switching adapter from Mean Well that works good enough for its price. I recommend to compare between this Mean Well adaptor and HDPlex alone before using LPS-1 too. ;)

"At the expense of confusing the issue with facts, I don't have one nor have a ready plan to sell the HDPlex and replace it with the LPS-1.

Which returns to exactly where we started. I remain curious as to Steve's observations as to how the two compare.

Good day - I'm ready to listen to some music!"

: No wonder why you're so defensive on HDPlex. You're already using it. I see. I see. Here's my recommendation.

1. Purchase LPS-1 with energized supply
2. Configure HDPlex to send 7V output to LPS-1
3. Compare between HDPlex and energized supply
4. Sell HDPlex if you find no difference or prefer Energized supply
5. Consider Nikola as next upgrade path if you find HDPlex working better than Energized supply.

Actually, you don't need to sell HDPlex since HDPlex -> LPS-1 is possible. If you're looking for reviews about HDPlex and Nikola LPS for future upgrades, you can find one here.

http://www.audiostream.com/content/exasound-audio-design-e32-dac

exaSound e32 DAC Review has both HDPlex and Nikola in tests.

Regards,
Keetakawee

 

RE: Ok, posted on March 17, 2017 at 13:59:32
E-Stat
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Posts: 37607
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 You're already using it

I chose from Sonore's recommended list as of last summer when I purchased the uRendu. BTW, you can learn a great deal about an inmate's system, room and musical tastes if you click on their moniker. Many like me post details and even pics of their systems.

Purchase LPS-1 with energized supply

Since you missed the first time around, I'll repeat:

I don't have any plan to replace the current unit because I am getting exceptionally good sound from my system. :)

 

RE: Ok, posted on March 17, 2017 at 14:16:28
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 "I chose from Sonore's recommended list as of last summer when I purchased the uRendu. BTW, you can learn a great deal about an inmate's system, room and musical tastes if you click on their moniker. Many like me post details and even pics of their systems."

: I see. Will look around later. Would be nice if there's audiophiles using good CD sources from Esoteric/Emm Labs/dCS/Wadia/Weiss too. I couldn't find matching power supply for Nimitra to recommend because I couldn't ones with designs I prefer. So, I ended up building Nikola myself so it can sound similar to highend CD transports I've known so far.

"Since you missed the first time around, I'll repeat:

I don't have any plan to replace the current unit because I am getting exceptionally good sound from my system. :)"

: Reading again. You're right. You used past tense and I didn't notice that before. I thought you're considering to upgrade with LPS-1.

Well, if you like current sound then it's OK. Be careful about using 7V from 15-20V too since it tends to be hotter on lower voltage, especially with 100VA transformer like that.

Regards,
Keetakawee

 

Thanks for the concern, but, posted on March 17, 2017 at 14:31:19
E-Stat
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Posts: 37607
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 Be careful about using 7V from 15-20V too since it tends to be hotter on lower voltage, especially with 100VA transformer like that.

is unwarranted.

Using my digital infrared thermometer, the case and heat sink temperature measure 71.2 and 71.4 degrees F, respectively. By comparison, the front panel of the preamp which isn't even turned on is 69 degrees which happens to be room temperature. :)

 

RE: Thanks for the concern, but, posted on March 17, 2017 at 14:39:23
Windows X
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 I see. That's good then. Do you also use air conditioner? In Thailand, weather is very hot so I'll need to be extra careful about temperature.

Regards,
Keetakawee

 

RE: Thanks for the concern, but, posted on March 17, 2017 at 14:49:06
E-Stat
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Posts: 37607
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 Do you also use air conditioner?

When necessary. I live in the southern US where it does tend to be both hot and humid during the spring and summer. I get vastly more heat, however, from the sixteen 6550C output tubes than a power supply barely operating above idle while doing its job.

Then it's time to jump in the pool!

 

RE: Ok, posted on March 17, 2017 at 06:46:53
E-Stat
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 I built PSU with 45VA toroidal transformer. I can limit 1A current for 7V too using 45 or even 160VA transformer. That's my point.

Is that necessarily better?

My goal is to build PSU for computer audio with reference from Esoteric CD transports.

Emulate whoever you choose!

 

RE: Ok, posted on March 17, 2017 at 06:51:49
Dynobot
 IMO the biggest fail of computer audio is the electrical noise from the Processor.

Someone needs to make a board with a de-coupled processor.

As far as power, everything benefits from clean power. But, again imo, someone could spend far less to get a new 220 Line and circuit breaker etc. just for audio with balanced power. I think the benefit would be greater and every component would excel.

 

Someone does, posted on March 17, 2017 at 08:34:46
AbeCollins
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 "Someone needs to make a board with a de-coupled processor."

It's called a microRendu. The processor is on a mezzanine card 'decoupled' from the main board ground plane and other components.

ARM Processor 'green' board. Main board ground plane and other components in 'blue'.


 

RE: Someone does, posted on March 17, 2017 at 12:54:05
Dynobot
 Hmmmmmmm

Interesting!!

I might just have to jump on the uRu train.

 

RE: Someone does, posted on March 17, 2017 at 10:58:16
Dynobot
 Hmmmmmmm

Interesting!!

I might just have to jump on the uRu train.

 

RE: Someone does, posted on March 17, 2017 at 11:28:24
Ryelands
Audiophile

Posts: 1867
Location: Scotland
Joined: January 9, 2009
 Interesting!!

Way back around 2008, a stock recommendation of the cMP2 "project" was to have a modest spec PSU for the CPU (ATX P4, 12v) and another, preferably antsy-fancy linear, for the gubbins (ATX P24). The hair-shirt mob was already powering RAM and even USB separately. (It was that sort of project.)

Results were reportedly good though my choice was to go "headless" using a tiny embedded processor, an idea I got from some chap called Swenson.

Dave

 

RE: Someone does, posted on March 17, 2017 at 12:58:17
Dynobot
 Yeah I remember cMP2.

No doubt there are 'smart' manufacturers trolling these boards getting ideas to bring to market.

Way back then I actually built a cMP machine and it did sound damn good. Its just that Linux had me first and I felt more comfortable with Linux.

Oh and Windowz basically sucks!

 

As for me, posted on March 17, 2017 at 07:02:42
E-Stat
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 I had two dedicated 20A lines installed in my listening room.

 

RE: As for me, posted on March 17, 2017 at 07:09:53
Dynobot
 I've got dedicated lines too, plus for my front end I use Power Regeneration and then a Balanced Transformer unit.

I'm convinced that vibrations exist and travels into gear via the electrical lines. The prongs in unused electrical outlets act like tuning forks and vibrate.

 

You smoking too much wacky tobacky ?, posted on March 17, 2017 at 08:32:31
AbeCollins
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 or maybe you're just being funny:

"I'm convinced that vibrations exist and travels into gear via the electrical lines. The prongs in unused electrical outlets act like tuning forks and vibrate."



 

RE: You smoking too much wacky tobacky ?, posted on March 17, 2017 at 09:16:56
Dynobot
 No not funny or whacky.

Really!

But then I think crystals with too

 

RE: You smoking too much wacky tobacky ?, posted on March 17, 2017 at 09:27:35
AbeCollins
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Well of course crystals !! But outlet tuning forks? ;-)


 

Ohmmmm... -nt, posted on March 17, 2017 at 19:39:10
E-Stat
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 .

 

These things, posted on March 17, 2017 at 13:42:25
Dynobot

I use these in my audio room and other rooms with empty outlets.

 

RE: You smoking too much wacky tobacky ?, posted on March 17, 2017 at 09:48:04
Dynobot
 Yes very micro vibrations.

I use these little things you stick in the outlets for a pretty good Improvement.

 

RE: You smoking too much wacky tobacky ?, posted on March 17, 2017 at 23:11:02
AbeCollins
Audiophile

Posts: 46280
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 When I was a kid I used these things in open outlets to cause macro vibrations.



 

DANG!, posted on March 17, 2017 at 06:58:48
Ivan303
Audiophile

Posts: 48887
Location: Cadiere d'azur FRANCE - Santa Fe, NM
Joined: February 26, 2001
 Now ya got me thinking about running a 220V three wire extension cord from my 22V Electric Cloths Dryer in the garage, up the side of the house to the listening room on the third floor loft.

Who knows?




First they came for the dumb-asses
And I did not speak out
Because I was not a dumb-ass

 

RE: Ok, posted on March 17, 2017 at 04:06:27
Dynobot
 I haven't seen any company producing highend digital equipment using R-core transformer though.

Really?

What kind of 'digital' equipment? Dacs?

What would you suppose the benefits or drawbacks would be to using R-Cores in digital equipment?

 

Cary, posted on March 17, 2017 at 08:49:06
AbeCollins
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 Cary makes some high-end CDPs with R-Core power transformer. I've owned a few Cary players over the years. I'm sure there are others using R-Core. E-Stat already mentioned some.



 

RE: Cary, posted on March 17, 2017 at 09:34:22
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 I see. Thank you for informing me this. Cary's CD player sounds pretty decent too for that budget. But I prefer Esoteric X-03SE with the same buidget as its flagship model back then.

 

RE: Ok, posted on March 17, 2017 at 04:44:03
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 What kind of 'digital' equipment? Dacs?
: CD Transport and DAC yeah.

What would you suppose the benefits or drawbacks would be to using R-Cores in digital equipment?
: Benefits of R-core in digital equipment? Maybe you can build smaller size DAC with higher VA. I think toroidal transformer is more suitable for digital equipment with lower noise.

Regards,
Keetakawee

 

RE: Ok, posted on March 17, 2017 at 05:01:17
Dynobot
 Interesting.

My Dac's have R-Core.

Is it your opinion that Toroidal is better than C-Core too?

It was my understanding that low level source components benefit from R-Core.

 

RE: Ok, posted on March 17, 2017 at 05:03:58
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 I'm talking from my observations with highend CD transport and DAC I know in market. What is your DAC by the way?

 

RE: Ok, posted on March 17, 2017 at 05:20:52
Dynobot

What about Phono Stages would they benefit more from Toroidal too?

Wonder why Audio Research put a R-Core in their $7,000 phono stage?

 

RE: Ok, posted on March 17, 2017 at 05:24:47
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 Is that digital equipment?

 

RE: Ok, posted on March 17, 2017 at 05:32:42
Dynobot
 Maybe in all the excitement you missed my question.

"What about Phono Stages would they benefit more from Toroidal too?"

 

RE: Ok, posted on March 17, 2017 at 05:38:22
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 It depends on design. Some works better with toroidal and some on R-core. As I told you, toroidal is good with lower noise and R-core can provide more power efficiently.

My $2k phono uses EI transformers and I have nothing against that. I never say which one is superior. It's just all highend digital sources I found either use switching or toroidal transformer.

 

CDP?, posted on March 17, 2017 at 05:14:00
Dynobot

Would you consider Audio Research Hi-End?

 

RE: CDP?, posted on March 17, 2017 at 05:22:28
Windows X
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 Audio Research builds famous highend preamps. But I haven't seen anyone using digital sources from Audio Research. Well, if they did make products at scale like dCS Vivaldi or Esoteric Grandioso, I'd love it hear them too.

 

RE: CDP?, posted on March 17, 2017 at 05:25:13
Dynobot

Audio Research makes the full range of audio gear from Dac to CDP to Phono stage, Preamp, Amps etc.

Even some of their preamps use R-Core like this SP20

 

RE: CDP?, posted on March 17, 2017 at 05:26:07
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 I use $20k SACD transport + DAC from company being famous on digital audio. If you understand what I mean...

 

RE: CDP?, posted on March 17, 2017 at 05:29:38
Dynobot
 Oh ok, Hi-End = $20k+

Got it, thanks...!

Given the laws of diminishing returns, that extra $19k gives you about a 1% improvement in sound...if that.

I bet it looks good though and makes for a great conversation piece..:-)

 

RE: CDP?, posted on March 17, 2017 at 05:35:40
Windows X
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 If $1k can sound good like 99% of $20k, I wouldn't have bought $20k equipment.

Anyway, Audio Research is company specializing in analog products. They may have their reason from analog perspectives. Now I know there's Audio Research using R-core on some of their digital equipment too. Thanks.

 

RE: CDP?, posted on March 17, 2017 at 05:41:36
Dynobot
 If $1k can sound good like 99% of $20k, I wouldn't have bought $20k equipment.

LOL!!!!

You'd be surprised.

Winner take all bet....hypothetical of course.

Connect a $1k product [digital front end] to your system along side your $20k [digital front end]. Let 10 people do a DBT, if 6 or more pick the $1k product you loose your $20k product.

You willing?

 

RE: CDP?, posted on March 17, 2017 at 05:45:02
Windows X
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 Since this isn't in my field to talk about, I'll end our discussion here.

 

LOL.....Looks like you're not so Condident after all....nt, posted on March 17, 2017 at 05:47:10
Dynobot
 .

 

RE: LOL.....Looks like you're not so Condident after all....nt, posted on March 17, 2017 at 05:49:43
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 It's "Confident".

 

RE: LOL.....Looks like you're not so Condident after all....nt, posted on March 17, 2017 at 05:51:38
Dynobot
 LOL....

I got too excited...

The prospect of winning a $20k digital front end and all....

:-)

 

RE: LOL.....Looks like you're not so Condident after all....nt, posted on March 17, 2017 at 05:55:13
Windows X
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 I totally get that. I used to get too excited thinking my modded $1k DAC can sound as good as those highend CD players. :D

 

RE: LOL.....Looks like you're not so Condident after all....nt, posted on March 17, 2017 at 06:00:02
Dynobot
 Have a great Friday and a wonderful weekend.

Let me go try to calm down.

 

Mr. X, You're Funny!!!, posted on March 17, 2017 at 05:57:33
Dynobot
 You should try modding your $20k gear.

I'm sure you can find something that could be improved.

I bet I could...first thing I'd do is change those transformers to R-Core.

 

RE: Mr. X, You're Funny!!!, posted on March 17, 2017 at 06:05:00
Windows X
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 I did. But I changed from switching power supply to linear power supply using ultra low-noise toroidal transformer though. ;)

 

RE: Mr. X, You're Funny!!!, posted on March 17, 2017 at 06:11:34
Dynobot
 And that made it sound better?

Do you also put ketchup on Kobe beef?

I've never heard a Toroidal that wouldn't make a good door stop. Who makes them?

 

RE: Mr. X, You're Funny!!!, posted on March 17, 2017 at 06:16:44
Windows X
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Posts: 209
Location: Thailand
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 It sounds better of course.

I didn't put ketchup on Kobe beef.

I don't know.

 

RE: Mr. X, You're Funny!!!, posted on March 17, 2017 at 06:19:31
Dynobot
 You modded something with Toroidals and you don't know who made them? Did you buy them off of Ebay or something?

Impossible....share the secret, I might want to try one...that is if I can afford it.

 

RE: Mr. X, You're Funny!!!, posted on March 17, 2017 at 06:20:55
Windows X
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 I don't know Toroidal that wouldn't make a good door stop. For my transport and DAC, my technician friend used toroidal transformer from Talema at that time.

 

RE: Ok, posted on March 17, 2017 at 05:10:04
Dynobot
 Maybe my Dac is not considered Hi-End...:-(

http://www.audio-gd.com/Master/Master-7_384/M7384EN.htm

 

RE: Ok, posted on March 17, 2017 at 05:20:01
Windows X
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 I guess it's not as not as highend as Esoteric ones.

 

RE: I'm intrigued, posted on March 16, 2017 at 09:10:12
Dynobot
 Well my Dac has $70 Dac chips so everything sounds good...:-)

 

:-) /n, posted on March 16, 2017 at 19:01:36
Ivan303
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Posts: 48887
Location: Cadiere d'azur FRANCE - Santa Fe, NM
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 n


First they came for the dumb-asses
And I did not speak out
Because I was not a dumb-ass

 

RE: I'm intrigued, posted on March 15, 2017 at 19:05:32
AbeCollins
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 "I just have a hard time accepting that the rendu is going to make much of a difference over my direct connection from my imac via usb."

I run both, a direct connect DAC to my computer and streaming over the network to the microRendu. Both sound outstanding. There is NOT a huge night and day improvement from one platform to another in my experience comparing my two setups. Of course this assumes that the direct connect computer setup is reasonably well thought out and not a botched up mess. Some folks are just all thumbs when it comes to computers so in those cases I would expect the network streamer to sound so much better.

This may be counter to the rational and what you read in the audio press, but the press will always favor, elevate, and hype audiophile brands & products that generate ad revenue over DIY computer based sources (or even DIY streamers).

In defense of reviewers, it probably doesn't make sense for them to review any DIY setup including their own as each individual system will consist of different configurations of Mac, PC, Windows, Mac OS, Linux, player software, etc. And you're not likely to see PCs and Macs advertised in audio magazines. Same goes for DIY streamers based on Raspberry Pi or other small generic computers. If it's not a "box" with an audiophile brand on it that a magazine can advertise and a reviewer can simply turn-ON and review, you're not likely to see much praise written for it. In fact, you'll usually see just the opposite.

BTW, the microRendu does not require a designer LPS power source (or ultracaps) to sound outstanding. You can certainly add one if you have extra cash burning a hole in your pocket but I have better places to allocate finite funds. Maybe a $1000 USB cable! ;-)

Just my 2-cents worth.


 

RE: I'm intrigued, posted on March 15, 2017 at 16:50:03
E-Stat
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 I just have a hard tiume accepting that the rendu is going to make much of a difference over my direct connection from my imac via usb.

From Abe Collin's experience, the answer is likely very little.

It would be easier if the rendu was half it's current price.

For me, it's plug 'n play superiority over my SB Touch player was worth it. I love the little RPi, but its a delicate creature. Nudge the micro USB power connector and it will power off. It's a great project for those who wish to tinker (and I do to an extent), but is not as stable a product as most consumers require. This is where the uRendu is superior.

 

RE: Initial impressions RPi vs uRendu, posted on March 13, 2017 at 01:13:08
soundchekk
Audiophile

Posts: 2426
Joined: July 11, 2007
 You're not comparing RPI vs. MicroRendu!!!

You've got a complete shuffled environment of interfaces, devices, cables . SW asf.

For sure this will lead you to wrong conclusions!!

For sure It won't be a RPI vs. MicroRendu comparison here.

However.
Obviously what matters is the outcome. If you're happy with what u hear
already, I'm pretty sure with some minor adjustments you'd be even happier.

BTW.
Did u try PiCorePlayer? With all mods on (HDMI off - LED off asf)?
Are u streaming PCM or flac? There's plenty of stuff to gain.


BTW.

Here's my HifiBerry thread (my first HAT project):

There a numerous tweaks listed. Many of them will also apply to the HB digital interface:

http://www.diyaudio.com/forums/digital-line-level/285811-hifiberry-dac-pro-hw-mods-anybody.html


And. If you've got 45years of diy-audio experience I really don't understand why you run after stuff like HDPlex supplies.
That stuff is something for folks like Mercman who can hardly turn a screwdriver.


Enjoy.






-----------------------------------------------------------------

blog latest >> The Audio Streaming Series - tuning kit pCP

 

Because..., posted on March 15, 2017 at 15:54:29
E-Stat
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Posts: 37607
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 If you've got 45years of diy-audio experience I really don't understand why you run after stuff like HDPlex supplies.

The uRendu manufacturer recommended it?

Sorry, but I have a professional life and don't have the time to cobble up my own 7V power supply. Or assume, that Sonore doesn't know what they're doing.

 

+1 DIY is great if you have lots of time on your hands...., posted on March 15, 2017 at 19:20:46
AbeCollins
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Posts: 46280
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 I've been a DIYer since my teens but in recent years it's been more cost effective and time effective for me to buy certain things.

Time spent on work and family are more valuable with higher returns vs time spent and any cash 'saved' on certain DIY projects. In other words, at this point in my life it makes more sense to earn money and buy vs DIY. That may change when I'm retired - or unemployed. ;-)


 

RE: +1 DIY is great if you have lots of time on your hands...., posted on March 16, 2017 at 04:16:24
Dynobot
 Well I can't claim to have decades of DIY experience but these days DIY projects like cobbling together a RPi or even a PS probably takes less than 1 hour, even for the novice.

Nothing wrong with buying off the shelf stuff though.

Everybody's take on HiFi is different. For me its a hobby which means I get pleasure with some amount of DIY. It took me all of 2 minutes to de-solder and solder on a couple of new Capacitors in a Havana Dac. And probably the same to cobble together a RPi set-up.

 

RE: +1 DIY is great if you have lots of time on your hands...., posted on March 16, 2017 at 07:35:26
AbeCollins
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I assembled an RPi audio setup a few years ago. I admit that it was fun but those early RPi were under powered and didn't work so great for audio. I know things have changed.

The $640 uRendu is a relative bargain against so many 'off the shelf' audiophile streamers and other related gear so I'm not too concerned. And it will have resale value if I ever decide to let it go.



 

You mean..., posted on March 16, 2017 at 08:24:50
E-Stat
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 The $640 uRendu is a relative bargain against so many 'off the shelf' audiophile streamers...

like the $17k Aurender W20? :)

 

A Bargain?, posted on March 16, 2017 at 16:01:13
Dynobot
 On the other hand, it takes nearly twice its cost in peripherals to be just barely better than a $35 general purpose cobbled together toy.

So at nearly $2k it just wins over the RPi.

You call that a bargain?


Hmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm

 

Let's put everything in perspective, posted on March 16, 2017 at 16:40:23
E-Stat
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 just barely better than a $35 general purpose cobbled together toy.

That buys you a naked board devoid of case, power supply and digital output. Unusable at that level to do anything. BTW, I've ordered a HiFiBerry Digi+ Pro given your recommendation. That was not part of our fisherman's original guideline. Perhaps I should have started there. Let's say $150 vs $640 for an equivalent, operational product.

So at nearly $2k it just wins over the RPi.

I'm not sure where you get the $2k figure. My investment is $640 for the uRendu, $400 for the power supply and because my DAC doesn't support a Linux based USB device, another $500 for the S/PDIF converter. That was an unplanned expense. Call it $1k.

And yes, I would definitely call a $1k device of that sound quality a bargain vs any number of hideously expensive alternatives. :)

ps: I've begun experimentation with my battery supplies. I need more time, but I believe using even a 1A battery provides more resolution than the $13 Jameco linear. Back to listening to it. :)

 

RE: Let's put everything in perspective, posted on March 16, 2017 at 17:58:12
AbeCollins
Audiophile

Posts: 46280
Location: USA
Joined: June 22, 2001
Contributor
  Since: February 2, 2002
 My battery supply. Using a 7.2V 10Ah NiMH battery with lower ESR than Li-Ion per your recommendation.... and it has a more constant voltage output before drop-off when it begins to deplete.




 

Looks nice!, posted on March 17, 2017 at 06:09:22
E-Stat
Audiophile

Posts: 37607
Joined: May 12, 2000
Contributor
  Since: April 5, 2002
 Just a bummer they need recharging. :)

 

RE: Let's put everything in perspective, posted on March 16, 2017 at 17:03:46
Dynobot
 Okay maybe I exaggerated a little in favor of the RPi.




 

RE: Let's put everything in perspective, posted on March 16, 2017 at 17:54:41
AbeCollins
Audiophile

Posts: 46280
Location: USA
Joined: June 22, 2001
Contributor
  Since: February 2, 2002
 By about $1300 !! ;-)

uRendu $640. Power supply $60.



 

RE: Let's put everything in perspective, posted on March 16, 2017 at 17:55:55
Dynobot
 A slight rounding error...:)

 

RE: Let's put everything in perspective, posted on March 16, 2017 at 17:59:44
AbeCollins
Audiophile

Posts: 46280
Location: USA
Joined: June 22, 2001
Contributor
  Since: February 2, 2002
You were just trying to make a point. We forgive you. ;-)



 

RE: You mean..., posted on March 16, 2017 at 09:02:05
AbeCollins
Audiophile

Posts: 46280
Location: USA
Joined: June 22, 2001
Contributor
  Since: February 2, 2002
Yes, that one! And several more.

 

RE: Initial impressions RPi vs uRendu, posted on March 13, 2017 at 13:24:28
Mercman
Audiophile

Posts: 6581
Location: So. CA
Joined: October 20, 2002
 Klaus,

Is this really necessary?

"That stuff is something for folks like Mercman who can hardly turn a screwdriver."

 

RE: Initial impressions RPi vs uRendu, posted on March 14, 2017 at 02:03:25
soundchekk
Audiophile

Posts: 2426
Joined: July 11, 2007
 Yep. It was.

I honestly care about you.

I keep trying to get you away from that commercial brain-wash/marketing track.

You recall how much fun you had when attaching a stupid coil to
a cable?
Can you imagine how much fun it is to build your own system!?!?

Just try. And you'll never look back!


Enjoy.



-----------------------------------------------------------------

blog latest >> The Audio Streaming Series - tuning kit pCP

 

RE: Initial impressions RPi vs uRendu, posted on March 16, 2017 at 04:21:19
Dynobot
 You recall how much fun you had when attaching a stupid coil to
a cable?


LOL!!!!!

Sound complicated and labor intensive, would be much easier to spend $500 on the same cable with a coil already attached.

Plus he would have more time to spend "quality time" with the family!


 

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