This is a Logic Soundlab TX1804 high performance, 4 channel MOSFET amplifier. Logic Soundlab’s products are engineered and designed exclusively for today’s high quality and bass oriented car audio sound, and this amplifier is no exception. This high performance MOSFET power four-channel amplifier will deliver 1800 watts of power to your car stereo system (450 watts x 4 channels @ 2 ohm) and is perfect for flexible integration into any after-market system. It will provide for 900 watts RMS power (225 watts x 4 channels @ 4 ohm), and is bridgeable. It is 2-ohm stereo stable and features an internal thermal and short circuit protection. It has tri-mode capabilities which allows you to drive full-range speakers on the front channels while bridging the two rear channels to power a subwoofer, and was designed with built-in variable low and high pass filter crossovers and bass boost. Also featured: nickel plated terminal strips and RCA input/output jacks, and a remote bass control.