[Bertie the Bunyip]

"Bret Ludwig" wrote in
oups.com:


Trevor Wilson wrote:
"Dave Plowman (News)" wrote in message
...
In article ,
Eeyore wrote:
Have you ever spent any time listening to a true Class A solid
state amplifiers ?

Yes. A mate drove his ESLs with a Sugden. One of the cleanest
sounding systems I've ever heard. Wouldn't shake the windows,
though. ;-)

**Sugdens have never built pure Class A amps (whatever that means).
They have only ever built high bias Class A/B designs. And, of
course, Class A is only Class A when specified into a particular load
impedance. Usually 8 Ohms. Given the fact that ESLs vary all over the
map, impedance-wise, suggesting that the amp is Class A is even less
likely.

This is actually true.

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.

So-called experts, and their toadies and asskissers (such as
Jeboo-selling Randy Slone) have pounded on the idea that Class AB is a
poor design methodology because of "transconductance doubling".
Obviously this is nonexistant in the region of Class A operation