XD600/1 - JL Audio 600 Watt Class D Monoblock Subwoofer Amplifier
RMS Power Rating (14.4V): 4 ohms: 400 watts x 1 chan. 2 ohms: 600 watts x 1 chan. RMS Power Rating (12.5V): 4 ohms: 300 watts x 1 chan. 2 ohms: 500 watts x 1 chan. Unregulated MOSFET switching type power supply NexD Ultra-High Speed Class D topology Wired JL Audio HD-RLC remote level control sold separately LED power (green) and protect (red/yellow) indicators State-of-the-art microelectronic components Mono channel operation Advanced Thermal Rollback System completely eliminates annoying thermal shut-down events Studio-grade signal processing with fully variable crossover filters Extruded aluminum alloy system setting security cover Total amplifier efficiencies exceeding 80% Noise-killing, highly flexible differential-balanced inputs Preamp RCA outputs to daisy chain multiple amps Defeatable low-pass and infrasonic crossover filters Dual speaker terminals simplify speaker installation 3-Way System Protection circuitry (thermal, overload, and speaker short protection) Heavy duty compact unitary cast alloy heat sink for extreme heat dissipation Silver-plated RCA level inputs Silver-plated screw terminals Input sensitivity: Level: 100mV-4V Variable low-pass filter (50-500 Hz, 12 dB/octave Butterworth or 24 dB/octave Linkwitz-Riley) Infrasonic Filter (30 Hz, 24dB/octave Butterworth) Damping factor: >1,000 @ 4 ohms / 50Hz, >500 @ 2 ohms / 50Hz Frequency response: 7-500 Hz Dimensions: 8-1/2"L x 7-1/16"W x 2-1/16"H RMS Power @ 4 ohms 400 watts x 1 channel RMS Power @ 2 ohms 600 watts x 1 channel RMS Power @ 1 ohm Not Stable  Total RMS Power Output 600 watts Maximum Input Gauge Size 4 AWG Minimum Impedance Unbridged 2 ohms THD at Rated RMS Power 1.0%  Preamp Outputs 1 pair Built-in Crossover Low-pass (LP) Low-Pass Crossover Frequency 50 - 500 Hz Subsonic Filter 30 Hz Signal-to-Noise Ratio 87 dB Channel Separation 67 dB  JL Audio HD-RLC Fuse Rating 50A x 1