KEF R400b Subwoofer
At just 31 inches square, the KEF R400b may be compact, yet it packs an incredible punch. With a reinforced and braced sealed cabinet, the R400b houses twin 9-inch LF drivers powered by twin 250W class-D amplifiers. The drivers are mounted back-to-back, to create ‘force cancelling’. This means the opposing reactive forces are nullified, resulting in no cabinet agitation and a clean, fast, powerful bass performance – perfect for any serious home theatre system.
ModelR400bDesignPowered Subwoofer (Sealed)Drive UnitsBass units:
LF: 2 x 225mm (9in.)Frequency range (-6dB)26Hz – 140HzMaximum output111dBAmplifier2 x 250W (500W)
built-in Class-DLow pass filter Variable40Hz – 140Hz, 4th-orderLow level signal inputsRCA phono socketsInternal volume22 litresPower requirements100V – 120V / 220V – 240V
~ 50 / 60HzPower consumption600VAWeight21.5kg (47.4lbs.)Dimension (H x W x D)
(with grille, terminal & plinth)365 x 330 x 351 mm
