I am new to this site and am looking for help!!! setting up a hometheater bass system, have a nad t775hd amp which has 2 subwoofer outputs.Have got a psb sub which works fine, but am trying to incorperate 2 EV bass bins a furman crossover and a crown power amp that I have from my band days for additional bass.Have run a cable from the 2nd subwooer out on the nad but can't seem to get enough signal. the cable seems to be fine,but can't even get a signal when plugged directly into the crown power amp.Would appreciate any help!!.