KEF Subwoofer R400b

Dynamic, uncompressed and undistorted bass of heart pounding clarity envelops you, striking deep emotional chords. Your soul will awaken and the earth will move. 

Please don't hesitate to contact your friendly staff at Audiotech for more information about this product.


  • Design Powered Subwoofer (Sealed)
  • Drive Units Bass units: LF: 2 x 225mm (9in.),
  • Frequency range (-6dB) 26Hz - 140Hz,
  • Maximum output 111dB
  • Amplifier 2 x 250W (500W), built-in Class-D Low pass filter,
  • Variable 40Hz - 140Hz,
  • Low level signal inputs,
  • RCA phono sockets,
  • Speaker level inputs,
  • Internal volume 22 litres,
  • Power requirements 100V - 120V / 220V - 240V,
  • Power consumption 600VA,
  • Weight 21.5kg (47.4lbs.),
  • Dimension (H x W x D) (with terminal & plinth) 365 x 330 x 351 mm (14.4 x 13 x 13.8 in.),

Collections: KEF, Subwoofers

Type: Subwoofer

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