What are you looking for?
A good bass sound needs three important components - the bass player (we've yet to hear a good bass without someone actually playing it), the bass guitar and the amp.
Bass sound is low, and that means it pushes some air if you want to be heard, requiring higher amp numbers than guitar amps. Bigger amps, bigger speakers to cope.
So don't blow it - check out the best bass amps in the business with Mega Music: Fender, Orange, MarkBass, GK, Ampeg...and more.