Sony XM-N1004 Mono Subwoofer Amplifier

You'll get up to 600 watts RMS of bass power with Sony's XM-GS100 mono amplifier driving your sub. For maximum reliability, this compact amp sports a hefty heatsink that shunts off the heat that's generated when the amp's working hard. The XM-GS100 will also protect your subwoofer, with a Dynamic Distortion Suppressor circuit that rounds off the corners of dangerous square waves, minimizing the destructive effects of an overdriven signal.

All connections are located on one side of the amp, which makes wiring simpler and neater. The tuning controls sit protected under a cover so they won't get inadvertently moved. You'll find a low-pass filter for keeping high notes away, along with a subsonic filter that helps tune your bass for a ported enclosure so the lowest notes don't get out of control. You can crank up the variable bass boost if you need some more bump. Sony protects this amp with a 3-year warranty, and that says a lot.