KEF R400b Subwoofer

Description

R400b

Featuring a reinforced, braced cabinet housing twin 9-inch low frequency drivers, R400b is ably powered by 2 x 250 Watt class-D amplifiers. These drivers are mounted in a "force-cancelling" arrangement for fast, powerful bass.

Force-cancelling drivers avoid cabinet agitation – opposing reactive forces are nullified by rigidly mounting the low frequency drivers back-to-back.

Dynamic, uncompressed and undistorted bass of heart-pounding clarity will envelop you, striking deep emotional chords. KEF promise your soul will awaken and the earth will move.

Massive vented magnet assemblies and large aluminium 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 awesome power of the R400b subwoofer.

Specifications

• Design: Powered Subwoofer (Sealed)
• Weight: 21.5kg (47.4lbs)
• Frequency Range: 26Hz-140Hz (-6dB)
• Power Consumption: 600VA
• Power Requirements: 100V-120V / 220V-240V ~ 50/60Hz
• Low-Level Signal Inputs: RCA phono sockets, Speaker level inputs
• Maximum Output: 111dB
• Recommended Amplifier Power: 2x 250W (500W) built-in Class-D
• Variable Low-Pass Filter: 40Hz-140Hz, 4th-order
• Drive Units: LF 2x 225mm (9")
• Crossover Frequencies: 400Hz / 2.9kHz

R Series

The KEF R Series offers a choice of three floorstanding speakers, a stand mount for more compact spaces and two accompanying matching theatre models. Each one offers the finest sound KEF has ever delivered in its category, whatever the dimensions of the room or system configuration.

Full KEF Range Available

Unilet Sound & Vision are official retail partners for KEF Audio, providing sales, advice and assistance on their entire range of high-quality audio products. Please do get in touch if you would like a demonstration or wish to purchase.

More Information

• R400b, by KEF Audio

Additional information

Brand

KEF

Founded in 1961 by ex-BBC electrical engineer Raymond Cooke OBE, KEF was initially headquartered in a Nissen Hut on the premises of Kent Engineering & Foundry (from where the name KEF is derived), a metal-working company on the banks of the River Medway, near Maidstone in Kent.

From the very beginning, the pioneering inventiveness of KEF loudspeakers was undeniable and now for several decades, audiophiles around the world have revered KEF for their innovative, high-performance, beautiful loudspeakers.