[quote name='dood' post='213536' date='Jun 5 2008, 10:38 PM']Try plugging into the effects return instead of the poweramp in. You need the volume control on the B2 in order to attenuate the gain of the poweramp, else it does a good job of amplifying the noise of the output stage on the BSB. It's a bit hard to explain, but I am familiar with the schematic lay out of most ampeg stuff and I think you'll get better results with the effects return.[/quote]
Its still humming Im afraid. Whatever I plug into them, be it the pre amp or my compressor, whether plugged into to the power amp in, the effects return or even the main input it still hums. If I plug my instrument into them its ok. Tried lots of different leads. Im stuck for ideas really! Did a gig with one on saturday, with the pre amp and compressor plugged into it, and used the balanced output on it and the soundman complained about the hum. Had to DI my bass in the end.