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In Reply to: RE: Thumbs-up Schottky Diode Audiolab 6000cdt Transport Upgrade posted by Jonesy on September 15, 2021 at 15:02:04
Looks like there are at least 3 regulators on the board...
I suspect that regulators with lower noise and better regulation
( like the Sparko labs ) would improve the performance of the
transport. Case damping might help also (drive case, too).
Follow Ups:
The Audiolab 6000cdt transport also has a read ahead buffer that is supposed to benefit from the diode upgrade in particular. But I'll admit I'm starting to think of all the other places and components I have that might be worth a look.Yes, besides doing the caps next, damping will eventually follow. I like to listen for a month or so between changes.
Edit: am also taking note regarding the drive case itself. Thank you.
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Edits: 09/17/21 09/17/21
Where are you getting the information about tweaking the 6000?
Link below of the German site that offers the mod as a kit or you can send the unit in.Not the prettiest site to navigate. Came across it a couple summers ago before I finally purchased the transport later that same year.
I don't see a reference to the read ahead buffer specifically benefitting from the diodes though. So I don't know where I picked that up? I think I more than likely confused the buffer with the servo mechanism. (Edit: Ah, yes, it does mention a benefit to the buffer after all, but as a general power supply upgrade.)
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Edits: 09/22/21 09/22/21
Now that you have listened to the 6000 for a while, what do you think of it's sonics compared to other transports? I have heard that it is a little on the bright (detailed?) side. What do you think?
I purchased the transport online solely based on reviews. Did not have an opportunity to compare it to any others in person at/or since that time.
I was aware in advance that it may sound slightly bright in some systems but I have a small variety of DIY digital cables on hand that I use that help address different situations.
I ended up using a stranded cable as opposed to a traditional solid core. Oddly the stranded has always worked best for me in the past when I used my older cd players as transports.
The cable took care of the slight brightness and that's how I used it until the warranty expired and I started the mods.
With loosening in our local Covid-19 health restrictions I hope to eventually compare it to other transports.
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Jonesy:
Did the brightness go down after the diode change? Have you found
some digital cables to sound warmer and less bright than others?
Before the Schottky diodes I found that certain passages of music had a harshness or smear inherent in the recording.
But now the sound is more focused across and depthwise in the soundstage. It wasn't the recording.
I think that smear is more "obvious" or "bright" with high frequencies and less so as you go down through the midrange and bass tones. So when people say "bright", they may not realize all tones may possibly be suffering. Either way, the diodes are an improvement.
Over the years I have found that I prefer certain cables over others in my set up. The cables did help with the overall brightness right from the start.
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
If the diodes made a difference in the sound, it had something to do with the reduced switching noise that they have. Given that, it would not be out of place to assume that high performance & very low noise regulators and better power noise filtering would help the sound of the transport.
Triode Kingdom at DIY Tube thinks you are imagining the Schottky performance. He prefers the 1N4007.
The Schottkys replaced a couple of bridge rectifiers for the power supply on the servo board for the transport. It's possible 1N4007s could have worked just as well or even better in this particular application.
Really happy with the results though.
With Covid-19 restrictions changing all the time, I sure miss being able to get together with others for evaluations.
Though a couple of loonies might skew results even more so, LOL!
Jonesy
"I know just enough to get into trouble. But not enough to get out of it."
Conventual to Schottky diodes will improve any electronics. It is same as a solid-state tube.
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