Connect with us

Hi, what are you looking for?

New Products

KEF Announces KC62​ Compact Subwoofer with Uni-Core Technology

KEF’s 1000-watt powered subwoofer uses new force-canceling Uni-Core technology to achieve deep and loud bass from a minimal footprint.

KEF KC62 Subwoofer Lifestyle in white beautyshot

Maximum Bass. Minimum Space. 

KEF today announced their new KC62 Subwoofer which uses patent-pending Uni-Core technology that enables high-levels of performance in a significantly smaller cabinet size. Measuring 9.68 x 10.07 x 9.76 inches and weighing 31 lbs, the new 1000-watt KC62 subwoofer uses two 6.5-inch force-canceling drivers — an uncommon, smaller driver size for subwoofers. The company claims this configuration delivers unprecedented depth and breath-taking accuracy in a compact and sleek design crafted from extruded aluminium. By its size and looks, it seems to be the perfect companion to KEF’s LS50 Meta or Wireless II bookshelf speakers. It should work well with any speaker for music and even home theater since it’s rated down to 11Hz.

KEF KC62 Subwoofer with LS50 Wireless II Stand-mount Speakers in Mineral White
KEF KC62 Subwoofer with LS50 Wireless II Stand-mount Speakers in Mineral White

“To deliver deep and loud bass from a compact product is a big engineering challenge. The Uni-Core™ is a breakthrough technology for KEF because it allows us to pack two drivers into a tighter space without compromising their performance.” 

Dr. Jack Oclee-Brown, Head of Research & Development at KEF

Uni-Core™ uses two dual force-cancelling drivers with concentrically arranged, overlapping voice coils, that are driven by a single motor. The voice-coils are different sizes and occupy the same physical space within the Uni-Core™ driver assembly. This allows for an extremely compact physical cabinet with significantly reduced volume when compared to subwoofers that rely on conventional driver technology. 

KEF Uni-Core Technology Cross-section

KEF says the KC62’s accurate, deep bass, speed and power are aided by three additional technologies: P-Flex Surround also known as Origami Surround, Smart Distortion Control Technology, and custom Digital Signal Processing described below:

  • P-Flex Surround is a brand-new patent-pending driver surround that resists the acoustic pressure inside the cabinet without limiting sensitivity in which traditional surround designs do. Evocative of the Japanese art of paper folding – origami – KEF’s P-Flex Surround is uniquely and meticulously pleated to resist internal air pressure without adding excessive mass. This innovative design allows the drivers to move with greater excursion, resulting in deeper bass extension and more accurate bass reproduction with vastly reduced distortion. 
  • Smart Distortion Control Technology is a patent-pending, sensorless, motional feedback system that helps correct even the slightest signal abnormalities and transients. By measuring the current in the voice coil, detecting, and then correcting any non-linear distortions, Smart Distortion Control delivers accurate bass with less colourization. This new approach reduces the interaction between signal, amplifier, and driver dramatically decreasing distortion. 
  • Custom in-house designed DSP (Digital Signal Processing) algorithms (KEF’s Music Integrity Engine). These algorithms include iBX (Intelligent Bass Extension) and SmartLimiter, which continually analyze the signal to prevent clipping, all while working together to ensure the perfect relationship between all components. The twin drivers are powered by 1000W RMS (2 x 500W) of specially designed Class D amplification, providing an exceptional level of control and the ability to easily deliver sudden bursts of power when required.
KEF KC62 Subwoofer in Mineral White Rear Angle


For setup, the five pre-sets on the Room Placement Equalization feature allows the KC62 to sonically integrate into any environment or listening room, whether it’s in a free space, next to a wall, in a corner, within a cabinet, or in spaces where volume is a concern. The KC62 is also compatible with the KW1 adaptor kit for wireless compatibility with minimal fuss. The line output High Pass Filter allows for exceptional fine-tuned integration, while KEF SmartConnect eliminates connection issues.

Price & Availability

The KEF KC62™ Uni-Core™ Force-Cancelling Powered Subwoofer will retail for $1,499.99 in either Carbon Black or Mineral White.

Where to buy: $1,499 at Amazon | Crutchfield or £1,299 at

KEF KC62 Subwoofer in Carbon Black Front Angle


DesignUni-Core Force Cancellation
Drive units2 x 6.5” drivers
Frequency response (±3dB)11Hz – 200Hz
Max output105dB
Amplifier typeBuilt-in Class D
Amplifier power1000W RMS (2 x 500W RMS)
Variable low pass filter40Hz – 140Hz, LFE
InputRCA phono sockets
Speaker level inputs
Line outputRCA phono sockets
Line output high pass filter40Hz – 120Hz, Bypass
Power requirements100 – 240V, 50/60 Hz
Power consumption1000W
Weight14kg (30.9Ibs)
Dimension (H x W x D)
with rear panel and feet
246 x 256 x 248 mm
(9.68 x 10.07 x 9.76 in)
ColorsCarbon Black
Mineral White

For more information:

About KEF 

KEF was founded in 1961 by Raymond Cooke OBE (1925–1995). Headquartered, in those early years, in a Nissen Hut on the premises of Kent Engineering & Foundry in the UK, after more than half a century at the cutting edge of audio the company remains committed to excellence in sound. From ground-breaking Uni-Q technology to the bar-setting LS50 Wireless, KEF’sflair for the unusual – and sometimes controversial – balances an obsession with design in harmony with the most innovative engineering. KEF’s reputation for quality is founded on a refusal to compromise on aural authenticity or experience. 

Advertisement. Scroll to continue reading.

Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *


You May Also Like

Bookshelf Speakers

All KEF Q Series bookshelf (Q150, Q350) and floorstanding speakers (Q550, Q750, Q950) are up to 42% off until December 31, 2023

New Products

ATC has made substantial improvements to their middle-of-the-range subwoofer which include a new 300-watt Class A/B amplifier and custom built 12-inch Sub-bass Driver.

Daily Deals

For a limited time, Amazon and KEF are teaming up with a big discount on one of the company's best bookshelf loudspeakers.

Daily Deals

The SVS Outlet Store is offering up 40% off subwoofers and speakers on Cyber Monday until they sell out.

In-Wall Speakers

KEF's Extreme Home Theatre Range adds two slightly more affordable in-wall LCR models with THX Ultra Certification.

Bookshelf Speakers

Looking for a great deal on a pair of award-winning loudspeakers this Christmas? KEF's 2023 Holiday Sale runs from November 3rd until end of...

New Products

The KEF LS60 Wireless Speakers are now available in five colors: mineral white, royal blue, titanium grey, British racing green, and carbon black.

Ask an Expert

The ultimate RSL subwoofer guide for deciding between a Speedwoofer 10S MKII or 12S.


ecoustics is a hi-fi and music magazine offering product reviews, podcasts, news and advice for aspiring audiophiles, home theater enthusiasts and headphone hipsters. Read more

Copyright © 1999-2023 ecoustics | Disclaimer: We may earn a commission when you buy through links on our site.

SVS Bluesound PSB Speakers NAD Q Acoustics RSL Speakers ProjectorScreen Focal Naim Audio Cambridge Audio