Krell's discrete I/U (I/V) converter for PCM1702 (Model KAV-250CD) - Schematic wanted - diyAudio
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Old 17th June 2010, 06:51 PM   #1
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Default Krell's discrete I/U (I/V) converter for PCM1702 (Model KAV-250CD) - Schematic wanted

Who knows the I/U circuit of Krell's KAV-250CD?
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Old 17th June 2010, 07:19 PM   #2
Hurtig is offline Hurtig  Denmark
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Wonder if even Krell knows it... Seems quite complex!
To a certain degree, I believe that less is more. Guess Krell do not agree
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Old 17th June 2010, 07:21 PM   #3
Bidoux is offline Bidoux  France
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I think it needs more resistors and more transistors. That thing is
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Old 17th June 2010, 07:53 PM   #4
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Way too many transistors!
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Old 18th June 2010, 12:52 AM   #5
qusp is offline qusp  Australia
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not exactly the most efficient layout ether, just one after the other. but what do I know. I have seen much more impressive examples from krell of discrete IV than this. still no schematic though, but check over at headcase
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Old 18th June 2010, 02:31 AM   #6
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That looks like a metric crapload of transistors, but notice the lack of coupling caps. I'm guessing that a significant portion of those are a servo system for the actual amplifier blocks.

but, holy crap that a lot of stuff!!!!

Sheldon
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Old 19th June 2010, 08:30 PM   #7
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Looks like the servos are done with those OpAmps. I see some (4?) differential pairs with parallel transistors (lowers the noise). Current sources are also done the same way.
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Old 19th June 2010, 08:55 PM   #8
Zen Mod is offline Zen Mod  Serbia
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it must sound as Drek , if you ask me

and I'm just half serious
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Old 20th June 2010, 01:19 AM   #9
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I don't know, they sell it with big $$$ so it must sound someway decent.
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Old 20th June 2010, 08:22 AM   #10
Hurtig is offline Hurtig  Denmark
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Quote:
Originally Posted by SoNic_real_one View Post
I don't know, they sell it with big $$$ so it must sound someway decent.
He he he..... So you expect that because t is expensive, it must sound good ??
I have attended a lot of test @ Kurt von Kubik, where people have shown up with their expensive amplifiers (Some of them way over 10.000USD)..... Until now, NONE of them has even beaten his old NAD3020. And most of these amplifiers has been sold/tried sold the next day!

Sorry to say, but most "High End" manufactures are so desperately searching for some reason to justify their crazy prices, that they have forgotten to listen to the products. Instead they focus on making it look like it should sound good.
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