The Stealth Ultra HDs are powered by a full range class D amplifier that also features auxiliary inputs, 2 volt line driver output to link to the Stealth 6 or 10 Subwoofer, waterproof connector, universal L mount brackets for end cap mounting or sliding top mount channel system, auto turn off feature to save battery life, back lit led illuminated control panel and a fully integrated wiring harness included. The Stealth AS-10 is an amplified all-in-one solution to give you the deep rich sound that everyone wants and deserves. It is the perfect compliment to the Stealth 10 Ultra and a breeze to install compared to other UTV subwoofer systems on the market. - Stealth 10 Ultra HD Black RMS Watts: 300 PEAK Watts: 600 Frequency Response: 40 hz-20k - HZ Length: 33.70 inches Depth: 3.92 inches Height: 3.70 inches Operating Voltage:12VIP67 Rated: Protection from total dust ingress & immersion from 15 cm - 1m depth - Amp: Built in 500 Watt Amp Frequency Response: 20Hz 250Hz - Battery Voltage Range 10.5 16 VDCVariable Low Pass Crossover 50 Hz 200 Hz - Variable Bass Boost 0-12d - B @ 45 Hz - Dimensions: 14.75 w x 12.75 h x 11.5 d - Weight: 22.4 Lbs