I have a powered center (Def Tech CLR3000) and it seems the sub may not be working however I dont think its the speaker. To test the speaker I hooked it up to the left channel of my amp (Earthquake Cinenova Grande) and it definitely had some output (one way I could tell was feeling the air movement with my hand directly over it). When connected to the center channel, wether on the 3803 or seperate amp, I feel nothing. Its set to large so it should be getting the full range signal. All of this leads me to two questions. First, is it possible that the center channel of the 3803 is somehow defective? I havent tried hooking up any other speakers to this channel yet so that will be next step. Second, is the 3803 only capable of sending out a frequecy range that is not really full range?