Pinnacle Speakers Baby Boomer Dual (2) 8-Inch 600 Watt Powered Side Firing Subwoofer (Black) (Discontinued by Manufacturer) Anti-clipping circuit for high level undistorted bass High quality, high power class A/B amplifier Butyl rubber surround provides excellent cone control and exceptional durability Auto on/off circuit with LED indicator Bipole configuration for maximum bass in minimum space Gold plated binding posts for a high quality and secure connection Includes 10' high quality gold plated interconnect cable Line level inputs Phase &amp; crossover bypass switches Satellite speaker crossover: First order @ 80 Hz Solid brass isolation cones Speaker level inputs &amp; outputs Variable crossover 50-150 Hz Volume control Anti-Clipping circuit for high level undistorted bass Includes high quality gold plated interconnect cable plus solid brass isolation cones for optimal bass resonse Line Level Input for fast hook up to your audio receiver and Phase Switch to adjust for room acoustics and for high volume content Speaker level inputs and outputs for fast hook up Auto on/off circuit with LED indicator and volume control