Configure R400b Subwoofer
At just 14 inches square, the KEF R400b high performance subwoofer is compact, yet packs an incredible punch. Only a serious subwoofer could keep up with KEF's R-Series, and the R400b makes an awe-inspiring addition to any listening room or home theater set-up.
The R400b's reinforced and solidly braced cabinet houses twin 9in. LF drivers powered by twin 250W Class-D amplifiers. The drivers are mounted back-to-back: This ‘force cancelling' arrangement nullifies opposing reactive forces. The result is virtually no cabinet agitation and therefore a clean, fast, powerful bass performance.
Legendary KEF R Series
Featuring many of KEF’s latest innovations in premium hi-fi and home theatre loudspeaker technology, the R Series makes genuine audiophile standards of entertainment more affordable than ever before. Stunningly fluent Uni-Q driver arrays combine with potent new bass drivers and many ingenious refinements to create a rich, spacious sound image of such accuracy that it approaches the benchmark standards of KEF’s legendary Reference Series.
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|Design||Powered Subwoofer (Sealed)|
|Drive Units||Bass units:
LF: 2 x 225mm (9in.)
|Frequency range (-6dB)||26Hz - 140Hz|
|Amplifier||2 x 250W (500W)
|Low pass filter Variable||40Hz - 140Hz, 4th-order|
|Low level signal inputs||RCA phono sockets
Speaker level inputs
|Internal volume||22 litres|
|Power requirements||100V - 120V / 220V - 240V
~ 50 / 60Hz
|Dimension (H x W x D)
(with terminal & plinth)
|365 x 330 x 351 mm
(14.4 x 13 x 13.8 in.)
** KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. **
|Subwoofer highly commended over $2,000
|Home Theater Top Picks