KEF R400b Subwoofer

  • $2,495.00


At just 14 inches cubed, 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 a ‘force cancelling’ effect. 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.

DESIGN Powered Subwoofer (Sealed)
DRIVE UNITS Bass units: 
LF: 2 x 225mm (9in.)
FREQUENCY RANGE 26Hz - 140Hz (-6dB)
MAXIMUM OUTPUT 111dB
RECOMMENDED AMPLIFIER POWER 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
DIMENSIONS 365 x 330 x 351 mm (14.4 x 13 x 13.8 in.) with terminal & plinth
WEIGHT 21.5kg (47.4lbs)
UNIT MEASUREMENT Piece