Hi guys,

I recently acquired a Phil Jones CUB II AG-150 BK amp in good condition. I had been looking for a two channel acoustic amp to us with my stick.

The amp has many features and all seem to work fine, the only problem is the continuous hissing, not humming. (hissing = hiiiiiiiiiissssss, humming = hummmmmmmm)

I tried it without any instruments plugged in, all knobs turned to 0, gains, volumes, master, everything and the hissing is still there.

Any ideas of what the problem could be and how to get rid of it?