I have a new system, 4 infinity kappas and kappa perfect 12 inch subs. I already have an amp powering the 2 12"s, would it be stupid to get a 4 channel amp and power the rest of my speakers, as the speaker rms is 50watt (or so, may be 70 in the rear?), and my head unit ( an alpine CDE-9852) only tops out at 45 watts. Would it make sense to get a 4 channel amp or am I being stupid? And would I need a cap for this if I did choose to get it?
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