Adrian C wrote:
Edward Green wrote:
Okay. I have had very old amps die on me in the past. But it does seem
unlikely.

I wonder if the distortion effect is the same in both channels? Evident
if using headphones, and related to volume? Has something happened to
your speaker's tweeters / crossover?

Strangely it seems less of a problem at louder volumes. But that may be
my imagination. Through headphones from the CD Decks via the mixer (more
sounds of Audiophiles passing out)it all seems to be much better. But I
don't exactly have top of the line Headphones for DJing.

The Distortion seems to be the same on both channels. However in testing
this I discovered that the Balance on the amp cuts one channel out
completely sometimes when you adjust it. Even if it is centered. This is
not a good sign.

I need to borrow another amp to test the speakers.

Perhaps, you were overdriving the inputs without realising you are doing
so? Or negative feedback circuitry component values have drifted and you
are listening to a loverly bit of crossover distortion? Maybe the output
transistors are going... but 10 years? I wonder if controls and switches
are introducing non-linear effects of their own making.

You are speaking in tongues! Is there anyway of testing any of this? The
Amp is pretty hefty and I wouldn't know where to start. Not after the
CRT capacitor incident!


Do a post over to sci.electronics.repair

Yup, I've also got DJ equipment (Pioneer CMX-3000) feeding my HiFi, and
a Rotel separates CD player doing the same. The Rotel player sounds
better but is naff for scatching ;-)

Glad I am not the only one.

Eddie