Kenwood X502-1 eXcelon 500-Watt @ 2 Ohms Class D Subwoofer Amplifier.

Highlights:
Max Power 1000W
Size (inch) (W) 8-3/8" x (H) 2-1/16" x (D) 5-7/8"
Variable Low Pass Filter
Bass Boost
Optional Wired Remote ReadyOutput Coil with Magnetic Shield. Prevents magnetic flux from radiating from the subwoofer's coil resulting in reduced noise and enhanced sound quality. Sliding Terminal Cover. Detachable sliding terminal cover offers a sleek design and easier installation. Variable Gain Circuit. Improved Signal to Noise Ratio. One-side Connection. All terminals and connections are on one side for easier installation and a cleaner look. Speaker Level Input Harness. Speaker Level Input Harness is included to connect to speaker wires from factory installed receivers. Optional Wired Level Control Ready..

What's in the Box:
•X502-1 subwoofer amplifier
•Speaker level input harness
•Mounting screws
•Owner's manual