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RE: Ok

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



Edits: 03/17/17

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