JL Audio XD600/1v2 Mono subwoofer amplifier - 600 watts RMS x 1 at 2 ohms RMS Power Rating @14.4V: 4 ohms: 400 watts x 1 chan. | 3 ohms: 500 watts x 1 chan. | 2 ohms: 600 watts x 1 chan RMS Power Rating @12.5V: 4 ohms: 300 watts x 1 chan. | 3 ohms: 400 watts x 1 chan. | 2 ohms: 500 watts x 1 chan. NexD High Speed Switching Class D Technology | Wired HD-RLC remote level control available, sold separately | LED power (green), over-current (yellow) and protect (red) indicators Selectable Low-Pass Filter Slope: 12 dB or 24 dB | Variable low-pass filter: 50 - 500 Hz, 12 or 24 dB/octave | Fuse Rating: 30A x 1 inline (not supplied) Dimensions: 7.09"W x 8.52"L x 2.05"H