JL Audio JX1000

Mono subwoofer amplifier
500 watts RMS x 1 at 4 ohms (1,000 watts RMS x 1 at 2 ohms)
Class D amplifier design
MOSFET switching power supply
Frequency response: 20 Hz - 150 Hz
Variable low-pass filter (50-200 Hz, 12 dB/octave)
Variable bass boost (0-12 dB at 45 Hz)
Optional wired remote level control
Preamp inputs and outputs
Speaker-level inputs