Thanks, looking forward to set the audyssey xt up and see how it sounds. So I'm in the process to hook up the sub and when I plug it in, it pops when I power it up and then has a loud humming sound. After a few calls, I go to buy an adapter that doesn't have a ground to see if I have a ground loop issue. When I plugged it in, the loud hum went away. When I put my ear up to the sub, I can still hear a hum inside but if I'm 2 feet away from it I cant hear it. Is this ok? I need to make a call to see what I need to correct to ground loop and am hoping the sub is ok. What an ordeal! When I received the sub via UPS the other day, two of the spiked feet were broken off during shipping. I was concerned that something might have jarred the amp inside the sub. It was shipped in the original revel box & packing. Just a little frustrated because im not an expert at this and trying to figure this out myself. I usually just read these forums but find myself in a position for guidance so I appreciate your feedback. Would like my next post to be me telling you how awesome this sub sounds in my system!