I just bought a sub enclosure for the e36 along with a JBl 8' subwoofer

This is the subwoofer:

http://www.amazon.co.uk/JBL-GTO-804D-8-SUBWOOFER/dp/B000FHAXPA



Recommend me a good quality but reasonable amp to match.

This is the enclosure I got, it is specifically designed to fit in the space behind the rear seat in the e36 convertible.



I only want a bit of bass that the car is lacking at the minute. There is a Pioneer head unit, 40W x 4 in situ at the minute. I have Poineer speakers all round connected directly to the head unit, so the amp is only required to power the subwoofer.

Any ideas appropriated.