Big bass from a compact powered subwoofer system.
The  BassPro SL powered woofer fits under the front seat of many vehicles, and adds 
powerful bass to any car audio system. An electronic crossover and flexible EQ adjustments 
let you tune the BassPro SL to your system, your car’s acoustic environment and your 
listening preferences. The energy-efficient digital amplifier provides a powerful engine to 
drive the subwoofer while staying cool even when driven hard. The 
BassPro SL delivers great 
bass output without taking up a lot of space. 
Features
  Proprietary, shallow-profile woofer
  Efficient Class D amplifier
  Intelligent electronic design
  System Control
  Line- and high-level inputs
  Wired, remote level control capability
BassPro SL 
Powered, 8" (200mm) car audio under seat woofer system