BOSS OL4KD 4000 Watt Class D Mono Block Outcast Series Amplifier

4000 x 1 MAX @ 1 Ohm
1550 x 1 RMS @ 4 Ohms
Remote subwoofer level control
RCA line outputs
Gain control
Input sensitivity selector
Variable subsonic filter
Strapping capability: Strap two amps together for twice the power
Variable low pass crossovers
0 - +18 dB Bass Boost
Power and protection LEDs
0–180º Variable phase shift control
Dimensions: 11-3/8 x 2-5/8 x 14-3/8"
Retail $419.95