wrote in message
ups.com

This may be true of these models but is not true of PA amplifiers in
general.

Wrong again. Name a current-production power amp that is pure class B.

It is one thing, and may even be true, to argue that, "This
QSC model unlike most PA amplifiers is a Class AB design, convection
cooled, and in my opinion merits consideration for serious domestic
listening and/or studio playback use in the most demanding
application."

Wrong again about PA amps not being class AB. As far as convection versus
fan-cooled goes, its mostly about power levels. Small SR amps tend to be
convection cooled, while more powerful ones tend to have fans. However just
because an amp has a fan, doesn't mean its loud.

It's quite different to argue , "PA amps are
cost-effective and suitable for serious domestic listening at better
price performance points than High End products."

Your problem Cal is that you're basically claiming that all SR amps are the
same. Guess what - they aren't all the same.

This latter claim is what you've been making, as I've heard it at least.

I've always tried to present a correct picture of SR amps - they are pretty
cost-effective compared to high end audio amps, they tend to be robust and
capable of handling nasty speaker loads, they have what most audiophiles
find to be unusual input terminals, they tend to be forced-air-cooled but
not all of them are. Even if they are forced-cooled people, with a little
creativity seem to be able to handle the situation. One common dodge is to
put the amp in a closet or an adjacent utility room. Finally, just because a
power amp is from a consumer audio specialist is no guarantee that it
doesn't have a fan.