JL Audio JL XD400/4 JL XD400.4 Class D 4 Channel 400 Watt Car Amplifier Amp
JL Audio JL XD400/4 Specifications JL Audio XD400/4 Car Amplifier. 4 Channel Car Amplifier. For car audio enthusiasts, Car Audio Warehouse is the place to be. Car Audio Warehouse. Frequency Response 12 Hz - 22 kHz (+0 -1dB).