This is a ButtKicker BKA-130-C power amplifier, a device that converts low-end audio frequencies into physical vibrations for immersive haptic feedback in gaming and home theater setups. It provides 90 watts RMS down to 2 ohms. Converts stereo into Mono This way the subwoofer transmits all bass from both channels. Can use for feedback or use for audio... The amplifier features controls for power, low filter cutoff (50 Hz - 70 Hz), and high cutoff frequency (70 Hz - 110 Hz). It is often used in simulation setups to simulate car engines, road textures, bumps, and curbs. ALSO: Powers a single subwoofer very well. hook to the sub-out on your receiver. can use on a subwoofer that does not have its own amplifier (PASSIVE WOOFER) Make that sub amplified. Will include output wiring with banana plug for easy use Will include rca plug. Very capable amplifier asking 50°° Cash only