500-Watt Monoblock Class BD Power Series Car Amplifier The T500-1bd produces the same amount of REAL power than it's predecessor, even though it's nearly 50% smaller in size! In about the same space as a college sized history textbook, you can now use a dedicated subwoofer amplifier to drive two 4-Ohm DVC subwoofers. This amp will provide enough bass to separate you from those envious car audio geeks. General Features: Mono subwoofer amplifier RMS Output @ 4-Ohms: 250W x 1 RMS Output @ 2-Ohms: 400W x 1 RMS Output @ 1-Ohm: 500W x 1 CEA-2006 compliant Dynamic Thermal Management cooling system Differential Input circuitry eliminates hum Variable low-pass filter (35-250 Hz, 24 dB/octave) Variable bass boost (0-18 dB at 45 Hz) Optional remote bass boost Class-BD amplifier design MOSFET power and output stages Preamp inputs and outputs 11-7/16" W x 2-3/16" H x 9" D