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Class D Switching Power Amplifiers and Power D/A conversion

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Old 6th December 2008, 01:36 AM   #11
ArthurG is offline ArthurG  France
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classdphile,

first, I did not say that the red rocks audio module is better than the ucd. please read my reply again. You make false assumption.

Second, because it's a commercial product and because I don't want to give out publicly some information about the design, please contact directly red rocks audio and particularly Jose Tasende, their engineer, I'm sure he will be very happy to assist you, like he assisted me.

oh and finally, no I don't want for red rock audio.

regards
Arthur
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Old 6th December 2008, 12:38 PM   #12
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Quote:
Originally posted by ArthurG
classdphile,

first, I did not say that the red rocks audio module is better than the ucd. please read my reply again. You make false assumption.

Second, because it's a commercial product and because I don't want to give out publicly some information about the design, please contact directly red rocks audio and particularly Jose Tasende, their engineer, I'm sure he will be very happy to assist you, like he assisted me.

oh and finally, no I don't want for red rock audio.

regards
Arthur
Hi,

Did you mean the false assumption that we're all equally aware of the context of the threads we post in?

It's funny but you didn't seem to have an issue publicly disclosing "design information" when you stated it used a common NXP IC.

Do you have Jose Tasende's email address then? I'd be happy to say hello.
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Old 6th December 2008, 01:37 PM   #13
ArthurG is offline ArthurG  France
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Quote:
Originally posted by classdphile


Hi,

Did you mean the false assumption that we're all equally aware of the context of the threads we post in?

It's funny but you didn't seem to have an issue publicly disclosing "design information" when you stated it used a common NXP IC.

Do you have Jose Tasende's email address then? I'd be happy to say hello.
Hello,

For the assumption, I think it was a misunderstanding I don't want to argue on rhetoric things. I only wanted to recommend you a nice module that maybe will please you. nothing else. Sound is a too much subjective thing...

For the "design information", again we are playing with words... but I believe it has a big difference between "this amp uses this kind of IC" and "this is the schematic of this amp and it uses IC brand XXX model YYY".

By the way, I send you Jose email by PM.

best regards
Arthur
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Old 6th December 2008, 02:33 PM   #14
dweekie is offline dweekie  United States
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Quote:
Originally posted by Kip
My speakers are Gemme audio Tantos V. 1 and i have a pair of ProAc One SC clones I built. I was always interested in class a amps but read that the Krells were bright as well as the Pass Labs stuff. I am looking at Butler amps, but don't want to sell my UCD700 amps for something inferior. I was hoping there may be something new to built in class d that might better what I have. Mine are the ad version with three Plitron transformers. They sound great, I am just looking for a change. You guys know how it goes.

What about upgrading to the HG modules? Everyone seems to note significant improvements over the AD.
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Old 6th December 2008, 05:05 PM   #15
Kip is offline Kip  United States
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Do they make an HG of the UCD700?
What about the sound of the UCD400? Is it better?
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Old 6th December 2008, 05:36 PM   #16
dweekie is offline dweekie  United States
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For info and pricing:
http://www.hypex.nl/
https://www.hypexshop.com/

400HG is cheaper, but if you need new transformers for the 400, the cost difference would be reduced compared to the 700HG. I'm not qualified to describe any sound differences among ucd models
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Old 6th December 2008, 05:54 PM   #17
Kip is offline Kip  United States
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I just went to Hypex's web site and saw that info. I am sure my 700's are the AD version and not HG and I don't have the new regulators. Now I wonder if I can update my modules to the HG version and install the hxr regulators or should I sell sell what I have and buy all new parts for monos from Hypex (about $1500.00) plus chassis (+$500.00 more).

My amps have three Plitron transformers in each.
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Old 6th December 2008, 06:10 PM   #18
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I'm sorry but the HxR regulators are only compatible with the new UcDxxxHG series.

Regards,

Jan-Peter
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Old 7th December 2008, 12:35 AM   #19
Kip is offline Kip  United States
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Well, maybe i should pull my UCD700AD modules and purchase the 700HG modules with the hxr regulators. I probably won't get much for the Ad modules though. i assume they are a direct drop in.
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Old 7th December 2008, 05:03 AM   #20
fredex is offline fredex  New Zealand
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Quote:
Originally posted by Kip
.......They sound great, I am just looking for a change. You guys know how it goes.
yep I know how it goes, I am not aware of any breakthroughs In Class D technology. I have used UcD180ADs for many years, I did change the opamps and short the coupling electros. I have not tried a seperate PS for the opamps but imagine the effects could depend on the qualities of the main PS and how hard you push it, I wouldn't expect a revelation here. I really think these modules are much better than people realise. Let us know if you discover anything better.
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