Soundcraftsmen PM860 weird behaviour

Howdy All!

I have a pair of Soundcraftsmen PM860 monoblocks. They are being fed by a Don Sachs Model 1 preamp.

When I turn them on, I hear the initial rush of current, then nothing.

If I turn them off and back on again, I get about 30 seconds of music, then nothing.

Any ideas what is going on?

TIA...
 
Last edited: