Loss of volume in right channel

Crazy, I'm going through the same exact thing right now (but in the L channel).

After about 5-10 minutes the left channel cuts out and begins to vary in volume. This is sometimes accompanied by static coming from the speaker.

Stehno's method is almost exactly what I did which helped me determine that my amp was faulty. When I switched the ICs on the amp end only, the problem remained in the left channel. When I switched the speaker cables on the amp end only, the problem switched to the other speaker. This told me that the speakers were ok, the source componentes were ok, and the amp wasn't. At any rate, the amp is now on its way back to the manufacturer.

BTW, what amp are you using?

http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1088111795&openusid&zzKetchup&4&5#Ketchup

Most-likely it's an amp.

First off we need to know what amp you have (tube? transistor?)

If you have a tube amp you'll definitely know it's a tube(s)

If you have SS amp and can reach an output transistors, you should check-compare its temperature on different channels.

Replacing transistors in SS amp is a-bit more tougher and may require tuning and matching. Often you would want to replace output transistors on both channels especially if you can't find right replacement.

If you connect only faulty channel, you may hear clipping even on low volume while the one non-faulty will play OK.

Pre-amp is a 13-year-old PSE Studio SL. Amps are monoblock PSE Mk Vs. All solid-state.

I had a similar experience with a channel going out occasionally. It would actually come back on when I would walk near the amp and back off when I walked away. I swapped cables and still happened. Finally bought new cables and problem went away.