Buy KEF R 400b Subwoofer at best price in India – Ooberpad
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KEF R 400b Subwoofer

₹ 115,000.00

Ooberpad brings you the KEF R 400b Subwoofer. 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.


1-year manufacturer's warranty

Key Features:

  • The R400b uses two ultra-low distortion 9 inches bass drivers, each braced with force-cancelling technology within the cabinet to allow both drive units to operate more effectively, giving greater definition to low frequencies.
  • The shape and bracing of the cabinet are computer optimized to minimize secondary radiation from the cabinet walls and distortion from standing waves.
  • Measuring a compact 14 inches deep and wide, the R400b delivers a surprisingly massive low-end with an incredibly quick response.
  • Frequency Range-26Hz - 140Hz (-6dB). Power requirements-100V - 120V / 220V - 240V, ~ 50 / 60Hz

Benefits of KEF R 400b Subwoofer:

Bass driver

Massive, vented magnet assemblies and large aluminum voice coils drive the lightweight yet stiff, strong hybrid cones. Bass output is faster, cleaner and more accurate. Satin anodised elements contribute to the unit’s elegance, while the diameter of the trim ring accentuates a visual sophistication that belies the speaker’s awesome power. 


A little finesse goes a long way to delivering a big impact. Every aspect of the R Series has been considered in the creation of a superb audio experience.Adjustable die cast aluminum feet support steel spikes, with integrated locking knobs for easy height adjustment. Nickel plated bi-wire connectors with terminal linking control allow all standard connection methods and provide easy, reliable connection.The geometry of the reflex ports has been tuned to minimize turbulence at high levels, reducing port noise and low frequency compression.


The R Series presents the high-end technologies of KEF Blade in a timeless, elegant format. Serious audiophiles can now enjoy phenomenally accurate reproduction that neither adds nor subtracts from the original recording. Indulge in a near THE REFERENCE experience at a price that will also be music to your ears.Refined, spacious and exquisitely detailed, you won't just hear music the way it was intended it to be. you'll live it, feel it and love it.

Where to buy?

Buy KEF R 400b Subwoofer online at the best price in Mumbai, Delhi, Bangalore, Chennai and all across India. Enjoy expert, prompt and courteous customer service from the team. We will help you choose better and will give you all the support you need to take the right buying decision in India.

Technical Specifications of KEF R 400 Subwoofer: 

Brand & Model # KEF 400b Subwoofer
Powered Subwoofer
Drive Units

Bass units: 
LF: 2 x 225mm (9in.)

Frequency Range
26Hz - 140Hz (-6dB)
Variable low pass filter
40Hz - 140Hz, 4th-order
Low level signal input
RCA phono sockets
Speaker level inputs
Maximum output


Internal volume


22 litres

Power requirements


100V - 120V / 220V - 240V
~ 50 / 60Hz

Power consumption



Recommended Amplifier Power

2 x 250W (500W) built-in Class-D

Dimensions (H x W x D)
365 x 330 x 351 mm (14.4 x 13 x 13.8 in.) with terminal & plinth

21.5kg (47.4lbs)

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