Autotek SMA1500.4 1500W 4-Channel Street Machine (SMA) Series Amplifier Brand: Autotek Features: Low Noise Pre-Amplifier Low Level RCA Inputs and Outputs Easily tie into OEM audio systems Class A/B Circuitry Designs Fully Adjustable 12dB Crossovers PWM MOSFET Power Supply Nickel-Plated Brass Screw Down Connectors LED System Protection Circuitry Aluminum heatsink with a black finish Symmetrical Profile Series: Street Machine Type: Amplifiers Amplifier Class: Class AB RMS Power: 2 ohm: 4 X 375 4 ohm: 4 X 185 Bridged Power: Bridged @ 4 ohm: 2 X 750 Frequency Response: 10Hz-45KHz