Alpine S-A60M Mono Digital Subwoofer Amplifier - 600 Watts x 1 2-Ohms & 330 Watts x 1 4-Ohms The S-Series amplifiers were designed to perfectly complement the already established and loved S-Series speaker and subwoofer line that Alpine Electronics has continually improved for years. The S-Series Amplifiers have a diagnostic LED located behind the blue Alpine Jewell on the top of the amplifier. A Blue light means the amplifier is operating normally. A red blinking light means the amplifier is currently too hot for operation and needs to cool down. A solid red light can mean three things 1. Amplifier circuit is abnormal. 2. Temperature is too high. 3. Power supply voltage is too high. Specifications: Power output 4-Ohm 14.4 Volts: 330 W RMS X 1 Power output 2-Ohm 14.4 Volts: 600 W RMS X 1 THD 10 W into 4 Ohms: Less Than 0.03% THD 10 W into 2 Ohms: Less Than 0.05% THD Rated Power 4 Ohms: Less Than 0.02% THD Rated Power 2 Ohms: Less Than 1.0% S/N Ratio: 1 W into 4 Ohms: >85dB Frequency Response:+0/-3 dB 10Hz - 400Hz Frequency Response:+0/-1 dB 20Hz - 300Hz Input Sensitivity: Hi (0. ), Low (0. ) Crossover: Variable HPF/LPF, (50Hz - 400 Hz) Dimensions: Width - , Height - , Depth - Weight: 4lb 3 oz In the box: S-A60M 1-Channel Amplifier 4 x M4x20 Self Tapping Screws 1 x Hexagon Wrench See more