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 R Series Sale is on while supplies last. Offer available direct from KEF and from your local KEF Dealer. While supplies last.
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.
| Model | R400b |
| 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, 4th-order |
| Low level signal inputs | RCA phono sockets Speaker level inputs |
| Internal volume | 22 litres |
| Power requirements | 100V - 120V / 220V - 240V ~ 50 / 60Hz |
| 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.) |
** KEF reserves the right, in line with continuing research and development, to amend or change specifications. E&OE. **
| Manufacturer | KEF |
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