The Hifonics Zeus ZXX 1000.4 is a 1000 watt 4 channel amplifier that gives your speakers and subwoofers the added oomph that they need.With flexible operation modes, you can customize the setup so it works for you. For example, you can hook up to 4 speakers, 2 speakers and a subwoofer, or it can be bridged to run 2 speakers or subwoofers. This amplifier can grow with your car audio setup. Step up the power and get better sound quality from your speakers and subwoofers with the Hifonics Zeus amplifier. | Hifonics | | ZXX-1000.4 1000 Watt 4 Channel Class A/B Bridgeable Car Amp Amplifier | Silver | Best Buy