Fully tested Scratches on top of the unit as seen in pics Works great! Free ship within the continental USA A subwoofer of revolutionary design in good working condition with a few cosmetic cabinet blemishes Rated flat down to 18 Hz and reproducing ultra low bass frequencies at 110 dB SPL It delivers explosive bass response with tight musical accuracy. • 2700-watt amp featuring patented Tracking Down converter power supply. •Input coupling is optical: accepts standard and high-level inputs. •Bore 8 inches - stroke 2.35 inches. •Total air volume displacement is over 235 cubic inches. •Crossover points: variable from 35 Hz to 100 Hz. •Crossover slope: 36 dB/octave. •Input level (volume) control •Phase continuously adjustable 0 to 180 degrees. •Frequency response: 18 Hz to 100 Hz (plus 0-3 dB). •Passive 70 Hz 6 dB per octave hi-pass line level output for Satellite loudspeakers •Dimensions: 11 × 11 × 11 •Weight: 48 lbs.