ALPHASONIK APTPK3 12" 800W Car 2 Subwoofers+Box+Amp New Alphasonik APTPK3 1600 Watt 12" Dual Slot Ported Bass Box with Amplifier and Amp Kit Class A/B Bipolar Power Amplifier Power Output: 800 Watts Achievable Power: 1600 Watts 2 Ohm Stable (Stereo)