If I use a 1001RB as a preamp (effects send to effects return of another amp) with no speaker attached to the 1001RB, will it damage the amp? Does it have the ability to shut off the speaker output? I've been wanting "the G-K sound" for a while, and was just offered up a surprise deal on a trade, which has the net effect of giving me the amp for a decent price. But I don't currently have a standalone external cab, so was thinking of using the G-K as described above. Thanks in advance!