Memphis 16-MCD500 500W RMS, Class D Monoblock MClass Series Amplifier Class D Monoblock Subwoofer Amplifier RMS Power Ratings: 250 watts x 1 chan. @ 4 ohms 500 watts x 1 chan. @ 2 ohms Compact Aluminum Chassis with Custon Black Pearl Finish RCA Outputs: 1 Pair Gold Plated RCA Connectors Full MOSFET Design Built-In Fully Variable Low Pass Filter: 50 - 250 Hz 18dB Per Octave Crossover Slope Built In Fully Variable Sub-Sonic Filter: 20 - 50 Hz Platinum Finish Wire Connections Accepts 4 Gauge Power and Ground Wire Optional Wired Remote Gain Control Adjustable Input Sensitivity: 200mV - 4V Dimensions: 12.6" L x 7.6" W x 2.4" H Power Specifications - Full Range Channels RMS Power @ 4 ohm...... 250 watts x 1 channels RMS Power @ 2 ohm...... 500 watts x 1 channels Amplifier Specifications Number of Channels. 1 - Mono Total RMS Power Output. 500 watts Minimum Impedance Unbridged. 2 ohms Built-in Crossover. Low Pass Low Pass Crossover Frequency. 50-250Hz Subsonic Filter. 20-50Hz Signal to Noise Ratio 95db