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KEF KC62 Compact powered subwoofer with digital processing (Titanium Grey)

Item # 991KC62T

This sleek, ultra-compact subwoofer kicks out surprisingly strong, deep bass, and looks good doing it.

This sleek, ultra-compact subwoofer kicks out surprisingly strong, deep bass, and looks good doing it.

Item # 991KC62T

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About the KEF KC62

Colin M.

Elegant and powerful

Let's get this out of the way. The KEF KC62 sure is pretty. Its smooth, curved lines and compact form look great in about any room. It's suprisingly small size also makes placement  easier — you can add deep bass to your home audio system, even in a room where space is tight. Even better, this little sub is deceptively powerful and delivers dynamic bass with some serious "oomph," all the way down to an impressive 11 Hz.

Elegant and powerful

Let's get this out of the way. The KEF KC62 sure is pretty. Its smooth, curved lines and compact form look great in about any room. It's suprisingly small size also makes placement  easier — you can add deep bass to your home audio system, even in a room where space is tight. Even better, this little sub is deceptively powerful and delivers dynamic bass with some serious "oomph," all the way down to an impressive 11 Hz.

KEF KC62 Uni-Core driver technology

Uni-Core drivers work together to help the KC62 punch above well above its weight class.

Uni-Core drivers

It's hard to find a sub that rolls out deep rumbles on movie night, reproduces fine musical details, and doesn't take up a bunch of space. With the KEF KC62's Uni-Core driver technology you get to have your cake — and eat it too. Dual 6-1/2" drivers are positioned back-to-back and share a single magnet system with concentrically arranged voice coils. This force-canceling arrangement gives the KC62 greater excursion than its size would normally allow. This means it can deliver volume output and depth like a much larger subwoofer, without sacrificing control or precision.

Origami-inspired surrounds

The KC62 uses P-Flex, a new type of driver surround designed to resist acoustic air pressure without adding excessive mass, which otherwise hampers the driver's sensitivity. This new pleated design is inspired by origami, the traditional art of Japanese paper folding. The end result of this "origami surround" is bass that's simultaneously deep and detailed.

Intelligent, customizable bass

KEF's Music Integrity Engine uses several DSP (digital signal processing) algorithms, like iBX (intelligent bass extension) and SmartLimiter, to automatically analyze your signal and provide real-time corrections. This helps prevent issues like clipping and improve the accuracy of your bass.

You can further optimize the sound with a suite of manual controls on the back of the sub, like an adjustable low-pass filter and phase switch. There are also five room-placement EQ presets designed to help you match your sub to its environment.

Versatile connection options

With both line- and speaker-level inputs and a line-level output with high-pass filtering, it should easy to integrate the sub into most home audio systems. If you prefer the flexibility of wireless, the sub is compatible with the optional KEF KW1 wireless subwoofer adapter kit (sold separately).


Product highlights:

  • built-in 1,000-watt Class D amplifier (2 x 500 watts RMS)
  • dual 6-1/2" Uni-core force-canceling drivers
  • ultra-compact, acoustic suspension (sealed) cabinet design
  • frequency response: 11-200 Hz (±3 dB)
  • maximum output: 105 dB down to 11 Hz
  • 5 room-placement EQ presets help you optimize your bass for its environment
    • Room, Wall, Corner, Cabinet, and Apartment modes
  • Music Integrity Engine uses several DSP algorithms to analyze the audio signal for deep, accurate bass
  • a wide range of controls and connections lets you customize your bass to suit your needs
    • variable low-pass crossover (40-140 Hz)
    • phase control switch (0°/180°)
    • line-level/LFE RCA and speaker-level inputs
    • line-level output with selectable high-pass filtering
    • independent volume control
  • connect to your system wirelessly with the optional KEF KW1 wireless subwoofer adapter kit (sold separately)
  • detachable power cord
  • 10-1/8"W x 9-5/8"H x 11-1/16"D
  • weight: 30.9 lbs.
  • warranty: 5 years woofer, 2 years amplifier
  • MFR # KC62T

What's in the box:

  • Powered subwoofer
  • 6.5' AC power cord
  • Speaker-level input block
  • User Manual
  • Important Safety Information
  • Warranty Information

Customer reviews for KEF KC62

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More details on the KEF KC62

Stacey B.

Features & specs

Enclosure Sealed
Woofer Size (inches) 6 1/2
Woofer Composition Not given
Firing Direction Side
Amplifier Output (watts) 1000
Frequency Response 11-200 Hz
Preamp-Level Inputs Stereo RCA/LFE
Speaker-Level Inputs Phoenix
Speaker-Level Outputs No
Wireless Optional
Low-Pass Crossover Freq 40-140
High-Pass Crossover Freq 40-120
Phase Switch Yes
App Control No
Remote No
Other Info
Height (inches) 9-5/8
Width (inches) 10-1/8
Depth (inches) 11-1/16
Weight 30.9 lbs
Speaker Parts Warranty 5 Years
Speaker Labor Warranty 5 Years
Amplifier Parts Warranty 2 Years
Amplifier Labor Warranty 2 Years

Product Research


Uni-Core Technology: The KEF KC62 powered subwoofer's patent-pending Uni-Core technology revolutionizes the traditional force canceling design to deliver deep accurate bass from an ultra-compact cabinet. Combining both 6.5" drivers into a single magnet system allows cabinet size to be reduced by over a third, while also increasing excursion to unlock exceptional output and depth.

  • KEF's innovative, patent-pending Uni-Core technology redefines the physical space high-performance speakers and subwoofers required to deliver deep and accurate bass. Through exceptional engineering and creativity, KEF engineers have revolutionized the traditional force canceling arrangement with a Uni-Core design that delivers deeper bass from ultra-compact cabinets.
  • The innovative Uni-Core system overcomes the performance compromises when placing force canceling drivers into a smaller cabinet. Uni-Core combines both back-to-back drivers into a single motor system. The overlapping, concentrically arranged voice coils allows for far more driver excursion than in other force canceling design, unlocking more output and depth from less space.

P-Flex Driver Surround: The P-Flex driver surround has a unique pleated design inspired by Origami, the Japanese art of paper folding, engineered to better resist the acoustic pressure in the cabinet to allow the driver to move more precisely compared to traditional surround designs. The result is deeper bass extension and a more accurate and detailed bass reproduction.

1000W Class D Amplifier: The KEF KC62's twin drivers are powered by 1,000W RMS (2 x 500W) of specially designed Class D amplification, providing exceptional levels of control and the ability to deliver sudden bursts of power when required, for example when enjoying your favorite movie or music soundtrack. The Class D amplifier uses in-house DSP (digital signal processing) and technologies to ensure the subwoofer is in control and sounds amazing at any volume level.

  • Smart Distortion Control: Smart Distortion Control Technology is a motional feedback system that helps correct any minute abnormalities that may occur. It does this by measuring the current in the voice coil and detecting and correcting any non-linear distortions. This reduces the total harmonic distortion (THD) by up to 75% and thus delivers a more accurate, less colored bass performance.
  • DSP (Digital Signal Processing): The subwoofer's performance is fine-tuned even further by a selection of in-house designed DSP (Digital Signal Processing) algorithms in the form of KEF's Music Integrity Engine. Algorithms including iBX (Intelligent Bass Extension) and SmartLimiter, which constantly analyses the signal to prevent clipping, work together to ensure the perfect relationship between every component.

Extruded Aluminum Sealed Enclosure: The compact, sealed box construction improves flexibility of positioning as well as the speed and clarity of performance. Crafted from extruded aluminum, the KEF KC62 powered subwoofer's curved cabinet perfectly blends form and function, providing strength and beauty. Its small enough to blend into any almost any decor with an attractive Carbon Black , Titanium Grey, or Mineral White finish.

Note: No grilles are included.

Rear-Panel Controls: Rear-panel controls (consisting of Volume Level, LPF/HPF crossovers, Phase and EQ Presets) help match the powered sub to your speaker system and room placement.

  • Volume Level: The volume control adjusts the output level of the subwoofer in relation to the main loudspeakers.
  • Placement Tuning Presets: There are 5 placement tuning presets so the powered subwoofer sounds great no matter where you position it. You can choose from Room (by front speakers), Wall (side wall), Corner (corner wall), Cabinet (inside a cabinet), or Apartment (reduces output level of and frequency below 40Hz)
  • Phase Control: The phase control will normally be set at 0°, but more output level can sometimes be achieve in the 180° position; in particularly when the subwoofer is far away from your main loudspeakers.
  • LPF Crossover: The low-pass frequency (LPF) crossover frequency control changes the upper cut-off frequency of the subwoofer. Its effective range is from 40Hz to 140Hz at a rate of 24dB per octave. The frequency control should be adjusted to achieve the smoothest integration and transition between the main loudspeakers and the subwoofer.
  • HPF Crossover: The high-pass frequency (HPF) crossover is assigned to the powered sub's line-outputs and is used to match the KC62'f frequency response to your speakers that are powered by a separate amplifier. You can set the HPF crossover between 40 and 120Hz, or it can be bypassed.

Note: There is a "Mode" switch on the rear panel which allows you to manually adjust the powered sub's low-pass crossover or bypass the sub's crossover; depending on if your AV receiver or integrated amplifier has a built-in LFE crossover.

Connectivity: The KC62 powered sub provides LFE, line-level, and speaker-level inputs to connect to a variety of AV receivers and integrated amplifier. KEF's smartConnect intelligent LFE and line-level inputs automatically detect a mono or stereo signal and adjusts the subwoofer volume level accordingly. It also provides a line-level output to daisy-chain the audio signal to another powered subwoofer.

  • LFE (Low Frequency Effect): The Left line-level input can be used as a LFE input and connected to your AV receiver's LFE output. In this setup, your receiver's built-in crossover settings will be utilized instead of the the powered sub's. Make sure the sub's crossover is set to "LFE".
  • Line-Level Inputs: If your receiver or integrated amplifier is not equipped with a LFE output but does have line-level outputs, you can use the powered sub's stereo line-level inputs to connect the subwoofer to your receiver or integrated amp.
  • Line-Level Outputs: The stereo RCA line-level outputs can be used to daisy-chain the LFE, Line-Level, or Speaker-Level input of the KC62 to another powered subwoofer. Or, it can be used to connect a separate amplifier that is powering your loudspeakers.
  • Speaker-Level Inputs: The speaker-level input consists of a detachable phoenix-block connector. These speaker-level inputs connect to the main speaker-level outputs of your receiver or integrated amplifier which is not equipped with an LFE out or line-level outputs.

Optional Wireless Adapter: The KEF KW1 Wireless Subwoofer Adapter (sold separately) allows you to wirelessly transmit the low-frequency audio signal from your AV receiver, preamplifier, integrated amp, or powered speakers to the KC62 powered sub. The KW1 Wireless Subwoofer Adapter consists of a wireless transmitter (TX) and wireless receiver (RX). The KEF KW1 provides a high-quality wireless transmission that delivers every ounce of detail and impact from your movie and music soundtracks. The KW1 operates in the high-bandwidth 5GHz RF band with an auto-selectable digital wireless link of 5.2GHz or 5.8GHz. It delivers a wireless audio signal up to 24-bit/48kHz that is near lossless with a low-latency of less than 17ms. The KW1 has a wireless range of approximately 49' (15M). Pairing is intuitive and simple with a pairing button on the transmitter and receiver. Simply, press both buttons to pair the two devices.

  • Transmitter (TX): The KW1's wireless receiver features a set of stereo RCA jacks that allow for connection to your AV receiver's, preamplifier's, integrated amp's, or powered sub's subwoofer/LFE output. The wireless transmitter does not come with its own power supply and receives its power via USB. You'll need an external USB/AC power adapter (sold separately - see Accessories Tab) or an AV receiver, preamplifier, integrated amp, or powered speakers with a USB (5V/1A) charging port to power the wireless receiver. The wireless receiver can simply be placed on top of your component or on a shelf next to your component.
  • Receiver (RX): The KEF KW1's wireless receiver simply plugs into the KEF KC62 powered sub's proprietary "Expansion" port to receive its wireless audio signal from the system's wireless transmitter. The proprietary "Expansion" port on the KC62 subwoofer also powers the wireless receiver (no external AC adapter or USB port required). Once the wireless receiver is plugged into the "Expansion" port, it is secured to the back of the powered sub by the included screws.

Note: The KEF KW1 Wireless Subwoofer Adapter comes with only one wireless receiver, but can support up two wireless receivers for a wireless connection of up to two KEF KC62 powered subs. An additional KW1-RX wireless receiver is available and sold separately.

Room Placement Equalization: The KEF KC62 powered sub can be placed effortlessly into almost any environment or listening room thanks to its 5 Pre-Set Room Placement Equalization feature ensuring the same performance no matter where you decide to place it; in free space, next to the wall, in a corner, nestled within a cabinet or using the dedicated apartment mode.

  • As the bass (low-frequency) sound produced by the subwoofer is non-directional it can be positioned almost anywhere in the room, although it should not be placed too close to the listener.
  • Because the KC62 is side-firing, it should be positioned at least 3" from any wall.

Detachable AC Power Cord: The KEF KC62 comes with a detachable 6.5' AC power that will need to be plugged into the back of the powered sub and into an AC wall outlet or surge protector (sold separately - see Accessories Tab).

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Customer Q&A

6 questions already asked

I read that people have issues using this with the key kw1 wireless adapter. Is that a real problem, or will this work? I am excited to get the LS50s, kc62 and the kw1 but don't want to do this only to have wireless problems.
joe  Jul 12, 2022
1 answer
The KW1 works great with the KEF KC62 subwoofer! We aren't aware of any known issues with the KW1. We've gotten a lot of great feedback from customers on that adapter and it's connectivity.
allison  Jul 12, 2022 (Staff)
How do I connect with LS50?
jose  Apr 10, 2021
1 answer
That will vary depending on the version of the LS50 speakers. I recommend contacting an advisor by calling 1-800-324-9695 to get a recommendation on how to connect it and the wiring needed to do it
jason  Apr 27, 2021 (Staff)
Has anyone attempted to paint a white KC62?
robert  Jan 12, 2023
1 answer
Greetings Robert, and thank you for your question. I would not have the reports on that for you I'm sorry. I'm sure our customers just buy the color they need.
hogan  Jan 13, 2023 (Staff)
How will the KC62 connect to my lsx ll speakers Is it wireless and does it plug in? Will sound quality be good located behind tv at approximately 2.5 ft height or better on floor??
dan  Jan 07, 2024
1 answer
Greetings Daniel. Thank you for your question. The KC62 is a wired subwoofer, however there are wireless subwoofer kits you can buy if its next to impossible to run a wire from the LSX II to the subwoofer. Bass is very omni directional, it may sound slightly better off the floor or on. Myself, I would like this sub on the floor, and to be seen. It is a show piece as well as a subwoofer.
hogan  Jan 07, 2024 (Staff)
What cables would I buy for the Speaker input option? I would be connecting this through a Bluesound Powernode
andre  Feb 26, 2021
1 answer
I used the wireless connection; works really well since my subwoofer is across the room from my Powernode
ulf  May 02, 2022

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