Flat sounding speaker

[lolsteve]

So just spent ages swapping out the front pioneer 130/30w speakers for some new vibe slick 6 240/80w. I was hoping for some new crisp sound with good enough bass to justify getting rid of the 6 x 9s and the amp in the rear. Tidy up the car and what not.

However the new vibe sound really flat against the old pioneer. I've done one side to compare against the old speaker and while the sound is a bit clearer it doesn't have the bass of the old one.

Annoyed is not the word considering I had to cut up mdf to get it to fit.

I'm guessing an amp is in order to power them since I think the headunit is only 50w rms (iirc)
Question is would this amp suffice?
http://www.ebay.co.uk/itm/500W-CAR-MOTOR...4d13a1ea62
It's an ebay jobbie but it's 500w (240+240 = 480) so should power the front speakers fine