8" woofer with 800 Watt Max Built-in Amplifier</br>Variable Low Pass Filter, Subsonic Filter and Bass Boost</br>Remote Subwoofer Level Control, Refer page no 9 for troubleshooting steps from user manual below</br>Thermal, Overload and Short Protection Circuits, High Level and RCA Low Level Inputs, Switchable Phase Control</br>Blue Backlight Illuminated Planet Audio Logo,3 Year Platinum Dealer Warranty</br></br>Product Description</br></br><p>Even vehicles with very little space can reap the benefits of more Bass with the low profile Planet Audio P8UAW Class A/B 8"" Amplified Subwoofer. This powerful 2-Ohm stable Amplified Subwoofer features 800 Watts Max Power with a MOSFET power supply to get your system rocking. With both high and low level inputs you can hook it up to just about any in-dash stereo and feel the pounding Bass. At a height of just 3"" this compact Amplified Subwoofer can easily fit in tight spaces, including right under the seat in many vehicles. Customize the sound with the Variable Low Pass Crossover, Bass Boost, Phase Control and Subsonic Filter. Crank up the Bass with the Remote Subwoofer Control. Cruise your tunes with the Planet Audio P8UAW. </p> <p> For further product details, please scroll down.</p></br><br/>http://www.amazon.com/gp/product/B00TKGWCGA