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KEF Q400b Subwoofer (Open Box)

Suggested RRP: £ 499.00
Our price: £ 399.00 inc. VAT
Total saving: £ 100.00
Free UK mainland delivery
Shipping UK Mainland Only - No Export

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Key Features

  • All Speakers Are Supplied With Grill Covers.
  • Amazing Sound And Build Quality

Product Description

Product Information

KEF Q400b Sub-woofer

One Only (Open Box) European Walnut finish only

The multiple award-winning Q Series has always exemplified KEF’s conviction that new materials and technologies can, when applied with intelligence and imagination, reproduce recordings so perfectly that they sound indistinguishable from the live event.

This is more true now than ever before.

KEF Q Series introduction video:


As the latest expression of this design philosophy, the new range immerses you in three-dimensional imagery of a richness and clarity that until now has been the exclusive preserve of speakers costing many times more.

KEF Q Series informational video:

Product detail

The final ingredient of your new Q system is of course the seductive Q400b sub-woofer.

A closed box design housing a 250mm (10in.) woofer driven by a 200W on-board Class-D amplifier, this discreet cube creates spectacular bass imagery – eloquent, musical and additively physical.

Anchoring the whole sound performance in an all-embracing sensation of immediacy, it completes the acoustic picture


  • KEF Q400B
  • Design: Closed-box subwoofer
  • Drive units: 1 x 250mm (10in.)
  • Frequency response ±3dB: 28Hz - 140Hz
  • Amplifier: 200W built-in Class-D
  • Maximum output (SPL): 110dB
  • Low pass filter variable: 40Hz - 140Hz, 4th-order
  • Low level signal inputs: RCA phono sockets
  • Internal volume: 23.2 litres
  • Power requirements: 100 - 240V ac ~ 50/60Hz
  • Power consumption: 200VA
  • General
  • Weight: 13.6kg (29.9lbs)
  • Dimensions (H x W x D): 335 x 330 x 330 mm
  • (13.2 x 13.0 x 13.0 in.)

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QED Performance Subwoofer Cable
QED Performance Subwoofer Cable
99.999% Oxygen Free Copper conductors
Award Winning Cable From An Award Winning Company
Our price: £ 39.00 inc. VAT

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