Ok I just got my new shiva 12" and an adire 250 watt plate amp, cut a hole in the back of an MCM electronics box big enough for the amp, screwed it in place, stuffed the box with poly fill (completely full) plugged in the sub, screwed it in, and all I'm getting is a REALLY loud hum. there aren't any directions with the amp, so I'm assuming the red and black wires off the back are the + and - speaker connections, so I hooked them up to one side of the sub, and connected the other set of terminals to them to parallel both voice coils (could this be my problem?) there's a right and left RCA input, I tried my sub cable in both of them, then hooked up a speaker lead from the left main to the high level ins to check, and it still hums. Any thoughts? it's got to be something retarded I did.. with no input hooked up, there's no hum, the sub cable is an acoustic research 25' I unplugged the sub cable when I plugged in the high level ins, the hum seems about the same on both.