Soundstream TX1.1300D Class D Mono Amp Soundstream Tarantula Series Monoblock Class D Car Amplifier Full MOSFET Power Supply Double side PCB and SMD components LED power (green) and protect (red) indicators RMS Power Rating: 4 ohms: 520 watts x 1 chan., 2 ohms: 900 watts x 1 chan., 1 ohm: 1300 watts x 1 chan.