Krell's discrete I/U (I/V) converter for PCM1702 (Model KAV-250CD) - Schematic wanted

[tiefbassuebertr]

Who knows the I/U circuit of Krell's KAV-250CD?

[Hurtig]

Wonder if even Krell knows it... Seems quite complex!
To a certain degree, I believe that less is more. Guess Krell do not agree

[Bidoux]

I think it needs more resistors and more transistors. That thing is

[QSerraTico_Tico]

Way too many transistors!

[qusp]

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

[stokessd]

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

[SoNic_real_one]

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.

[Zen Mod]

it must sound as Drek , if you ask me

and I'm just half serious

[SoNic_real_one]

I don't know, they sell it with big $$$ so it must sound someway decent.

[Hurtig]

Originally Posted by SoNic_real_one

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.