The other day when I was in the audio shop talking about getting some components there were some guys from Alpine in. I got to talk to them for 10 mins or so about their new amps and about the Type X sub... seeing as how I was thinking of grabbing some when they came out. It's going to be 2-3 months befor they really come out, they are testing the sub right now agenst the W7 and other super subs. The sub has 33mm of one way XMAX... and right now they are hitting it with 4500WRMS and it is doing just fine. They said they are going to spend $10,000 and buy a JBL Crown amp and see how many watts it can take befor it blows, they expect it to be around 6500. The shop I go to may get one in, if so I will go down and hear it. If it's all they say it is I might get 4 of them later down the road, to replace the Type R's I have.