PowerBass ASA600.1Dx 1200 Watt Max, Auto Sound Series Class D Monoblock Amplifier Auto Sound Monoblock Class D Car Amplifier RMS Power Rating: 4 ohms: 150 watts x 1 chan. 2 ohms: 300 watts x 1 chan. 1 ohm: 600 watts x 1 chan. Max power output: 1200 watts MOSFET power supply Double sided circuit board construction