CONTEMPORARY DESIGN FOR A PREMIUM HOME THEATER EXPERIENCE – A 10" Dynamic Balance woofer & front-firing port directs powerful lows at the seating area giving a CINEMATIC QUALITY to your music and movies BOLD SOUND WITH UNPARALLELED CLARITY – STATE-OF-THE-ART KLIPPEL TECHNOLOGY provides a resonance-free combination of materials and construction techniques that tune out distortion for INTENSE AND RICHLY-DETAILED BASS even at extreme listening levels A built-in high-powered amp generates 50 watts RMS/100 watts dynamic power for an EMPHATIC BASS RESPONSE and a wide dynamic range crucial to recreate the intricate details and AUTHENTICITY OF LIFE-LIKE SOUND EASY INTEGRATION WITH YOUR EXISTING SOUND SYSTEM. It offers a continuously variable low-pass filter, adjustable from 80-160 Hz A sleek detachable grille in front; with multiple line- and speaker-level inputs and outputs, POWER-SAVER ON/AUTO SWITCH, independent volume control and a TOGGLE PHASE SWITCH on the back panel make this sub a cohesive unit that outperforms its competition $80 obo, retails for $250