Decided to upgraded from a KSW-12 to the Paradigm PW-2200 in Dec. Well the store I was buying it from did not have one in stock but said they could have one shipped from another store that also carriers Paradigm. Great. The sub arrived and this is where the problems started. When it arrived it was a floor model and to top it off was scratched on top. The store was very apologetic and offered me $50 dollars off the price. I said that this was not enough. They said that they were already giving me a great deal and couldn't go any lower, but no problem I could use this one until they placed their Paradigm order and the new one arrived. Great, No problem. I realize this has nothing to do with Paradigm (so far) and the store I purchased it from has gone out of their way to accommodate me. Which is great. Anyway the middle of Jan came and my new sub arrived. Ya Ho. I exchanged the subs and proceeded to break in the new one(let music play for a couple of days and watched 10 or 12 DVD's) at lower volumes. During this time I was noticing something was different. So I ran it just on the test tone and you could clearly hear a problem. It sound like something was vibrating inside and there was popping sounds coming from the driver(volume was at half on the sub) I took it back to the store and let them listen after listening to then floor model and it side buy side at the same levels you could definitely tell the difference. The salesman and Manager both agreed. They said it was the test tone at a sustained level that made it noticable, but said their tech person would look at it and in the mean time I could take the floor model back home. Recontacted the store after a bit to see what they had found out. They said nothing seemed the matter and once again said it only did at a sustained level over time They have not what any new movies obviously. They would have to ship it to Paradigm. This would cost them money.Hum I guess that's what we will have to do I said. Talked to the Store again and asked them if they had shipped the sub. They said no because the Paradigm rep was in and listened to the sub. He said Yes it makes the noises but it is within the specs. and maybe it needed more break in time. They are not willing to do anything more than that. But the salesman said he is willing to swap the driver and amp board out of the floor model this will eliminate the scratch or give me the $50 dollar price reduction for taking the scratched one. I'm a little worried that the noise could be from the cabinet itself.I'm also pissed at Paradigm for their handling of this. The store has been very helpful but I did pay for a new sub. Any advice or suggestions would be appreciated.