thought i'd try plugging my gallo subamp into my gallo 3.1's the other day and got a horrible buzz out of speakers (sa not even on).

pre is a Decware csp3 using the mono output and Y-rca to gallo SA.
the stereo outputs going to khartago se+ monos.

I've used this subamp many times with various stereo amps with no problems.
It also works ok with driving a passive subwoofer using the decware mono output.

something about the csp3 and mono amps not liking the gallo sa???