So I have a set of db6501s and I was thinking of getting db651s. So I was thinking of upgrading my 651s to 6501s just like the front and running them off an amp. I have no idea what to look for when it comes to powering the comps up with an amp. When I installed my 6501s I temporarily hooked them up to an amp but the tweets sounded horrible. Any suggestions on amps if I do both comps in front and rear? I limited roomw here I am mounting this amp also so it can't be huge and I would like to stay in the 150 or less range if possible.