The GTA 460 amplifies and enhances low-power and audio signals from the receiver. It is High Power 4 Channel Class A/B car amplifier, High Level input with DC OFFSET turn on capability, 4X60 watts RMS at 4 Ohms and 4X90 watts RMS at 2 Ohms Amplifier with four channels of high power. Integrating with OE head units is a breeze thanks to the high level input and DC Offset Turn On capabilities.