yea u need to sell that amp unless you want to run it for your speakers what size L7 are you gettin i would get a kx400.1 for a 8" kx600.1 for a 10" and 12" kx1200.1 for a 15"
i think you amp is a 2 channel 100 rms briged 25 rms @ 4 ohm x 2 ch 50 rms @ 2 ohm x 2 ch 100 rms @ 4 ohm x 1 ch
the kickers are underrated i see them mostly around high 600 and low 700 rms birthsheets so youll be underpowerin your 12" by a little like 25-75 rms but in my opinion i would underpower l7's by a little because of the added stress points because it is a square subwoofer