In article , Serge Auckland
wrote:

wrote in message
oups.com...


Also, when I turn the amp right down I can hear a quiet hiss coming
from the speakers.


The easy one is the hiss, yes that's normal for all amplifiers, there
will be a little hiss. How audible it is depends on how much hiss, and
how efficient your 'speakers are. Into horns, even a little hiss from
the amplifier is audible, into "normal" speakers, it should be inaudible
at the listening position, and only noticeable if you are close, say
less than 50cm, from the 'speaker.

FWIW for the last 20+ years I've tended to regard it as unncessary for a
power amp to produce levels of hiss that are audible even with your ears
close to the speaker. However I'd agree this isn't unusual, and is
'harmless' if it can't be heard in the normal listening position. With the
amps I use it is therefore 'normal' for no hiss to be audible even if your
ear is just an inch or two from the speaker. But otherwise I'd agree with
what Serge wrote.

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html