Dennis Plunkett wrote:
> I do wonder what the HIFI manufacturers use?

Our Alpha 10 Integrated Amp (100WPC) uses an Nat Semi LM1972.
About 78dB range. And yes, it is fairly high fi. I have cloth ears but
the audiophile mags seem to be drooling over it.

I'd have preferred the Crystal Semiconductors CS3310.
This has 100dB range, and smarter pin-out (analogue/digital
on opposite sides instead of mixed). More expensive though.

We do know silicon 'pots' have the faults discussed, but we can only
wait for the technology to improve. If you chaps come up with any way
of doing programmable attenuation for a competitive price, I'd be
happy to stick it in our kit!

Jon - what do you think of the log attenuator sketch I stuck through
your
door? And the sales bumph? I think you'd like the Alpha 8SE HDCD player,
but given your house type, the Alpha 10 amp might provoke complaints
from bleeding-eared neighbours!

TTFN, KH