JL Audio JD500/1 JD Series mono subwoofer amplifier — 500 watts RMS x 1 at 2 ohms

Product info:

• mono subwoofer amplifier
• 250 watts RMS x 1 at 4 ohms500 watts RMS x 1 at 2 ohms
• Class D amp design with NexD™ switching technology
• frequency response: 7-500 Hz
• variable low-pass filter (50-500 Hz, 12 dB/octave)
• variable bass boost (0-12 dB at 45 Hz)
• preamp inputs and outputs
  
• differential-balanced inputs prevent noise
• signal-sensing turn-on with speaker-level inputs
• wiring, fuse, and hardware not included with amplifier
• 4-gauge power and ground leads and a 50-amp fuse recommended
• dimensions: 9-7/8"W x 2-1/8"H x 7-1/2"D