Keith G wrote:

"Eeyore" wrote
Keith G wrote:
"Eeyore" wrote
Keith G wrote:
"Eeyore" wrote
Keith G wrote:

Anybody got first hand experience of a truly *serious* SS amp?

Yes. One I designed myself. Mosfet output stage with 24 power
devices.

Sounds pretty efficient - beats the **** out of one triode per channel
then?

It'll drive rock and roll rigs too. 600wpc into 4 ohms - around 900 wpc
into 2.

As a monitor amplifier it was just lovely. Totally neutral.

'Was'...??

You don't still have it?

Was as in 'was manufactured'. It was too expensive for its real intended
market

Aha...??

As in it couldn't compete with cheap QSCs which is probably what they should
have asked me to design for them. But hey, don't knock it, I got to design a
rather super amplifier as a result.


of SR, a consequence of not having a properly (intelligently) defined
marketing and sales spec when I designed it. They wanted 'everything' and
got it -
at a price.

I do have a couple kicking around that just need tidying up. Trouble is
that it's fan cooled which isn't exactly ideal for home use. No problem in a

studio's machine room of course. The quiesecent dissipation is around 180W
!
That's half an amp in those mosfet at idle. Even an AP (Audio Precision
test set) is incapable of seeing any crossover distortion, mosfet output
characteristics work beautifully in such an application. Such distortion
as does exist is low order.

OK, so not a real contender for the home audio market, then?

It could certainly be adapted for home use. You hardly need 180V pk-pk for most
hi-fis.

Reduce that standing dissipation a tad and you've got a very nice amplifier that
no longer needs forced cooling.


Got any other 'industrial irrelevancies' you want to offer up?

What's irrelevant about it ?

Large studio amplifiers are often very similar except you're probably unaware of
that.

Graham