POWER ACOUSTIK GT2-900 Gothic Two Channel Amplifier Plays Mono and Stereo 2-Ohm Stereo/4-ohm Bridged Stable Class A/B Regulated PWM MOSFET Power Supply High Level Input w/ Signal Sense - Input for your Factory Radio! Variable 0-12dB 45Hz Bass Boost. 4ga Power/Ground & 8ga Speaker Terminals