"Scott Dorsey" wrote in message
...
Trevor Wilson wrote:
"Scott Dorsey" wrote in message
...
Bret Ludwig wrote:
High bias AB amps operate in class A through most of the power range
they spend all their time in, giving the advantage of Calss A operation
where it is needed, and rather than running out of power when this is
exceeded they simply transition into Class B.
This is true. The problem, however, is that although the distortion may
be much lower in class AB than in class B, the distortion spectrum is
often
less pleasant, at least to my ear. I often find a given output stage
sounds
better biased into class B than up higher into class AB.
**Bull****. Only poorly deisgned Class A/B amps sound significantly worse
than an otherwise identical Class A amp. Pay careful attention to my
words:
"Otherwise identical".
That's not what I said. That is not at ALL what I said.
For low power studio-grade applications, though, there's no reason not
to
just go whole-hog and run everything Class A. Electricity is cheap.
**There are plenty of reasons NOT to go pure Class A and very few to do
so.
Other than size and heat?
**Cost, reliability and the fact that high bias Class A/B is lower in
distortion.
--
Trevor Wilson
www.rageaudio.com.au
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