Alpine Type-X

[T3mpest 10+ year member]

True, good point. I guess its better to have more than needed so the amp wont be running absolutly full power, which like someone mentioned easier on the electical system. Wonder if i should jsut get a stock one and run it at half power(750w)..

Best bet in a sealed enclosure is to build it pretty big so you don't need alot of power. In sealed box ouput is soley based on how far the cone moves, their is no port or anything complicated going on, sub moves in and out, makes bass, moves further, gets louder. The less power you need to get it to move the less strain on the sub, electrical, and less distortion due to thermal compression. Build the box as big as you can and then set you gains so that the sub never moves much beyond xmax. It usually easy to tell when your pushing a sub to it's limits mechanically. You can also add a bit of polyfill to your enclosure to make it seem bigger than it actually is, as far as the compliance behind the sub is concerned (ie box seems bigger to the sub). This will work well with a type x since they have a very good lowend response.