Okay, first thing I want to say is Elemental design is bending over backwards to help me with the below issue but need some opinions. Got the sub and the 500 watt amp would not work, called Elemental design and that amp is being ordered so they sent me a 300 watt amp this morning and it doesn't work?? I worked for about 10 seconds with a Audyssey test tone then I turned down the volume a bit and went to turn it back up and it no longer works??? I was wondering if my Denon reciever is campatable with the subwoofer (A5-350). I am trying to just figure this out...never seen anything like it. All spekers set to small Lowpass filter set to highest to cancel it out for Audyssey.