Originally Posted by
sumday
ANY chance you can put up the model number.
a possible problem could be a builtin distortion sensing circuit...this was, is fitted to the 540/640 series integrated amps and was prone to throwing a hissy.
my son went through THREE 640s purchased new from richer sounds...all developed the same fault before he gave up and swapped for a NAD.
I hope your power amp is not suffering the same problem!!
p.s., in the integrated amps, upon premature activation the motorised volume control would lower the output.
NIGE.