Monoblock Class D Subwoofer Amplifier, 1000 W x 1 @ 2 Ω / 500 W x 1 @ 4 Ω - 14.4V This amazingly compact amplifiers delivers a real kilowatt of power at an unbelievably great price. Using a tough-as-nails Class D circuit with a robust MOSFET power supply, the JX1000/1D is fully capable of driving the toughest subwoofer loads with very good control and excellent sound quality. Targeted specifically for subwoofer applications, the JX1000/1D includes a low-pass filter with continuously variable cutoff frequency selection from 50-200 Hz. It also features a variable bass boost at 45 Hz. with up to 12 dB of boost and an optional remote level control. Dedicated hi-level inputs are included, in addition to conventional low-level RCA inputs, making it easy to integrate with a variety of OEM and aftermarket head units.