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Subwoofers - KEF Speakers

A subwoofer will transform your home cinema experience by offering a rich, deep and tuneful bass sound. A high quality subwoofer brings life to a chase in an action movie or bass solo in a live music recording.

Subwoofers are built to deliver impactful lows within a multi-channel speaker system; made up of either small satellite speakersbookshelf speakers or floorstanding speakers along with a centre speaker. We also sell pre-selected 5.1 speaker packages.


KEF is a British speaker manufacturer developing industry-leading products for over 50 years. KEF has received a host of awards and stellar reviews and currently offers a wide range of hi-fi speakers and AV speakers. 

The flagship KEF Blade and smaller KEF Blade 2 speakers are renowned for their excellence and superb reproduction, and their advanced pioneering technologies and Uni-Q Driver Array designs have filtered down into lots of KEF’s consumer-end products, such as the KEF LS50 wireless speakers.

In 1961, KEF was founded by Raymond Cooke OBE an ex-BBC Electrical Engineer and headquartered the company near Maidstone, Kent. The company was set on the banks of the River Medway in the premises of a former metal working company, Kent Engineering & Foundry. Overtime by experimenting with new technologies and materials, Cooke aimed to produce superior acoustic quality with recordings reproduced to the exact nature of the original performance. 

KEF became the first company to utilise the stability of Bextrene as a cone material, which has since been incorporated in many drivers for many leading audiophile speakers. Another major breakthrough a few years later, KEF became the first to design and test loudspeakers with computer modelling leading the industry in the digital analysis of speakers. Their revolutionary work resulted in KEF being able to match speaker pairs to within half a dB for flawless audio reproduction. 

KEF eventually went on to produce their signature technology, the Uni-Q point source driver array in the next decade using NASA-developed magnets that were ten times more powerful than conventional ones. KEF stayed ahead of the game in the nineties with the advent of 5.1 home cinema recording by creating the first dedicated centre speaker in the UK, the Model 100 benefiting from Uni-Q. 

Through the years, they have been developing impressive expertise in the use of advanced acoustical, magnetic and mechanical modelling techniques such as Finite Element Analysis resulting in an accuracy that was not previously achievable. Kept under wraps since the 1980s, KEF revealed their ACE technology in 2005 demonstrating the advantages of activated carbon inside a compact speaker enclosure and its effect on internal volume and bass extension.

Now five decades from the company’s inception, KEF's scientific innovation and hands-on experimentation cements their ultimate audiophile reputation and allows them to continue to lead in developing products ahead of the market. We stock the complete KEF range, from the multimedia range (that includes active speakers, headphones and earphones) to the Q series range, LS50 range, both the wired and wireless LS50, R series range, KEF Reference range and KEF Blade, along with custom install speakers and 5.1 speaker packages for a home theatre experience.

What makes a good Subwoofer? Our carefully selected range of subwoofers are a world apart from mass-produced home cinema systems with subs that can easily distort. A good subwoofer should reproduce a wide frequency range accurately, down to the lowest possible octaves and reproduce bass notes clearly rather than just "rumble".

We provide the best subwoofers for home cinema at various price levels for the best possible performance to give your music, movies and gaming experience that added oomph! Subwoofers come in a range of sizes and shapes – some models are designed to be no-compromise and deliver the best, most dynamic bass possible while others seek to offer improved bass performance from a compact and easy to accommodate unit. The size of the driver, or woofer, is directly related to the bass performance of the subwoofer and the amount of bass it can produce.

Standard woofer sizes range between 8 inches to 12 inches, though larger and smaller models are also available. Some models feature a pair of smaller woofers instead of a single driver, which work together to deliver vibrant bass in a much more compact cabinet. Bass frequencies are largely non-directional so subwoofer placement is substantially easier than placement of typical hi-fi stereo speakers. Having a subwoofer at the back of the room should not sound any different to having it at the front of the room.This means that, while they are often large and bulky, positioning somewhere discrete should be quite easy without affecting the overall sound experience.

Subwoofers are usually “active”, which means they have an internal amplifier to directly output sound at line level from an amplifier or AV receiver. Subwoofer amplifiers are usually “Class D” so they can typically be built to more compact specifications and for maximum efficiency. A subwoofer’s power rating is determined directly via the power of its amplifier so a 400W model features a 400W amplifier internally. There are some passive subwoofers available which require an external amp to power them.

To ensure the maximum possible sound quality, a well-designed subwoofer cabinet is integral. Rigidity and bracing as well as a solid cabinet, prevent unwanted resonance from ruining the coherency of the outputted bass. Subwoofers are isolated from the floor via spikes or isolation feet, which minimise the amount of contact between the subwoofer and the floor, decoupling and isolating it from the surface and preventing unwanted resonance.

Setting up the crossover section of your subwoofer is crucial to the performance of your entire system. To get the best from your home cinema system, the crossover should be configured so the frequency is at a point where your main speakers can handle the frequencies above and your subwoofer can kick in comfortably. The recommended crossover frequency is at 80hZ.

Frequency response is an important measurement of bass performance, measured as a range "40Hz-120Hz". While depth is not the only measurement of performance, it can be a useful measurement of the subwoofer’s capabilities, which when considered with driver size, allows you to better understand what you need for your unique listening space. If you need further help choosing a subwoofer, please call or e-mail us - we can also offer AV demonstrations in our Birmingham showroom.

Subwoofers - KEF Speakers

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