we had a new product arrive at work today that will give you the ability to have bass in your car, whilst keeping almost all of your boot space
the product is Mac Audio Flatblock 220, noit the best in the world, but then again, it uses 2 x 200mm subs which push a power figure of 120wRMS or 240wPMPO
if interested visit http://www.fryersales.com for more details