Velodyne DD-18 THX 18’ Subwoofer

Description: Servo-driven, remote-controlled, sealed-box, powered subwoofer with digitally controlled room equalization electronics and graphical user interface. Drive-unit: long-excursion, carbon-fiber-reinforced 18" paper-cone woofer and tandem, push-pull 3" voice-coil and 24-lb magnet. Inputs: 2 line-level (RCA), 1 balanced (XLR), 2 speaker-level (bare wire, banana plugs, or spade lugs); two XLR balanced microphone inputs, one each on rear & front panels. Outputs: 2 line-level (RCA), 1 line-level (RCA) output for test signal L/R & video. Rear-panel controls: Volume up/down. High-pass crossover (RCA output): 80Hz at 6dB/octave (nondefeatable). Low-pass crossover and subsonic filters (nondefeatable): 15-199Hz, variable in 1Hz increments, choice of 6, 12, 18, 24, 36, or 48dB/octave slope. Frequency response: 14-120Hz, ±3dB. Total harmonic distortion: <0.5%. Phase: 0-180 degrees, variable in 15 degrees increments. Amplifier: class-D, 1250W RMS (3000W peak). Supplied accessories: AC cord, remote control, microphone, microphone windscreen cover, tabletop microphone stand, microphone stand adapter, 25' audio/video cable to provide sweep tone and NTSC signal for TV set, 25' XLR-fitted microphone cable.
Dimensions: 23" (590mm) H by 21.25" (550mm) W by 19.25" (494mm) D. Weight: 123 lbs (56kg).
Finishes: Piano high-gloss cherry, maple veneers or hand-rubbed lacquer.
Read more at https://www.stereophile.com/content/velodyne-digital-drive-dd-18-powered-subwoofer-specifications#wVxO6vFjZKO49PrS.99