Wet Sounds STX Micro-1 Powersports Series Class-D Monoblock 1-Ohm Stable Ultra Compact Amplifier with Bluetooth Controls to Stream Music From a Smartphone Wet Sounds Powersport Series STX Micro-1 Class-D 1-Ohm Stable Monoblock Amplifier RMS Power Rating: 4 ohms: 250 watts x 1 chan. 2 ohms: 420 watts x 1 chan. 1 ohm: 600 watts x 1 chan. Total power output: 600 watts RMS CEA-2006 Compliant Amplifier Pulse Width Modulated MOSFET power supply LED power (green) and protect (red) indicators Soft start turn-on Mono channel operation 3-way protection circuitry (thermal overload and speaker short protection) Heavy duty aluminum alloy heat-sink Input sensitivity: Low level: 150mV-7V Frequency Response: 10 - 250Hz Total Harmonic Distortion (THD): 0.19% Signal to Noise Ration: >95 dB