If it is an a/b class amp then you can turn the LPF on and off. If it is a Class D amplifier (except for maybe a few) then you will always have a LPF on because class d amps generally dont do as well with the higher frequencies anyway and are usually mono amps meant for subwoofers.
Personally, I'd just get rid of the back speakers and worry about the front. Stereo is 2 channels, not 4.
As far as what amp to get, give a price range and I can point you in the right direction.
Also, check out FloridaSPL.com. No offense to RF, but the audio forum is a little slow and undereducated. FLSPL is were a lot of big competitors and audio enthusiasts go to. It's mostly Florida members and we have a lot of members in the Tampa area (including myself) including some who live right down by MacDill. I actually go down to MacDill to go to the commissary (College Student, dad is retired Navy).
2000 Mazda B3000 TL Edition 2wd
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