JL Audio XD600/1 v.1 Mono amp. Produces 600 Watts x 1 channel at 2 ohms. Amp works like new. Bought 4 years ago refurbished from an authorized dealer. Never pushed hard as I'm no bass head and a SQ guy. Cosmetically is an 8/10 because of some scuffs and scratches. Functionally is a 10/10 as it still sounds as good nd strong as new. Price includes Amp, original box, manual, remote bass knob, and USPS Priority Shipping to the continental 48. You will need a basic 4 conductor phone cable to connect the knob. Thanks for looking!