What are my options in hooking up a dual 4-ohm voice coil subwoofer to two of the channels of a four channel amp? I have an Infinity Kappa 54a amp. I'm going to use two of the front channels to drive the front speakers and I want to use the rear channels to drive the subwoofer. The bridged output would be 150 watts at four ohms. The specs don't say whether I can run any speaker at eight ohms or one set at four ohms and another at two.
