sony makes one now thats 400 watts x2 the power of a normal one. has a built in mini amp. its 50rms per corner.
iirc crutchfield has it. dont remember the model number ill try find a link.
was line 200 bucks too cheap enough for that kind of power.
http://www.sonicelectronix.com/item_...X-XB100BT.html