KEF - Reference 8b

KEF - Reference 8b Twin 9 inch Drivers 'force-cancelling' Subwoofer Delivering exceptional bass precision and control with zero distortion, Reference 8b is a truly extraordinary subwoofer. The Refernce 8b For power with accuracy the Reference 8b sub has two 500W Class D amplifiers, each driving a 228mm (9 inch) long-throw, ultra-low distortion driver. These are connected back-to-back in a heavily braced, acoustically inert cabinet. The result is low distortion bass with effortless body and weight. Feature Set Includes:   * Weight  - 75lbs.   *  Dimension  -  H x W x D : 15.7" x 14.4" x 16.8"   *  Finishes  -  Deep Piano Black   *  Inputs  -  RCA phono sockets, analog XLR socket & Speaker level inputs   *  Frequency Range  -  Free Field: 18Hz (-6dB)   *  Frequency Response  -  24Hz at 90dB output in free-space mode (±3dB)   *  Net Internal Volume  -  23L   *  Maximum Output  -  110dB (peak sound pressure level at 1m 50Hz)   *  Amplifier Type  -  2 x 500 W Class D with switched mode power supply and DSP based control section   *  Drive Units  -  LF 2 x 225 mm (9in.)   *  Power Consumption  -  1000W   *  Variable Low Pass Filter   *  Variable frequency: 40Hz to 160Hz   *  Variable slope: 12dB/oct, 18dB/oct, 24dB/oct   *  LFE mode: 350Hz, 18dB/oct