There's also the indoor size of your automobile to think about. You might wish to consider a 5-channel amplifier that can power your entire system from one compact as well as hassle-free plan. It's 4 networks for your speakers, plus a 5th, higher-powered network for your subwoofer. 6- and also 8-channel amps take that all-in-one layout and also add even more system-building flexibility.