You are buying a new Speaker and Amp kit that includes 2 of J&M's Performance series 7.25" Front Speakers, 2 of J&M's 5.25" Performance Rear Speakers and a J&M 400 Watt 4 Channel Amp that will fit 2006-2013 Harley-Davidson Ultra Classic models with 4 speakers. The Performance Speakers are the largest diameter speakers that can be installed into the Harley-Davidson BatWing style fairing and include Speaker Grills with Mid-Range and Tweeter speakers. The speakers are designed at 2 ohms impedance with an impressive 140 watts maximum input. They provide a solid gain in the mid/high frequency range and base response when powered by an amp. Included are the speakers, grilles, mounting adapters, hardware and complete instructions. The 400 watt, 4 Channel Amp is a full range class D amplifier and puts out 100 Watts RMS per channel (400w total) driven continuous into a 2 ohm load @ 14.4vdc. Custom made plug-n-play wiring harnesses are included with this amplifier kit with top quality heavy gauge power/ground wires for the fused battery connection, along with all necessary mounting brackets, hardware & complete installation/operation instructions.