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KEF Reference 8b Subwoofer - As Traded
Condition: Used. Good, some scratches on top and top/front edge, swirl marks from cleaning (See Photos)
Includes: Power Cable Only (No Box)
SN: 006073B
Includes 3 month (90 day) warranty
Overview
The KEF Reference 8b Subwoofer is engineered to deliver 18Hz extension while maintaining KEF's signature speed and agility at up to 110dB.
Built around a force-cancelling architecture, Reference 8b employs twin 9" long-throw drivers within a heavily braced enclosure, each powered by it's own 500W Class D amplifier.
The rear preset options provide instant crossover and low pass filter levels for pairing with Reference 1, 3, 5, Blades and Blade Two's. Room position EQs help manage the subwoofer in your room. An LFE mode is also included for seamless home theatre integration.
Connection options are as expected - RCA, balanced XLR, and speaker-level inputs.
Specification
Weight 34kg
Dimension H x W x D : 398 x 365 x 429 mm
Dimension H x W x D : 398 x 365 x 429 mm
Unit Measurement Pair
Finishes Deep Piano Black High Gloss
Inputs RCA phono sockets
Analog XLR socket
Speaker level inputs
Frequency Range Free Field: 18Hz (-6dB)
Frequency Response 24Hz at 90dB output in free-space mode (±3dB)
Net Internal Volume 23L
Maximum Output 110dB (peak sound pressure level at 1m 50Hz)
Amplifier Type 2 x 500 W Class D with switched mode power supply and DSP based control section
Drive Units LF 2 x 225 mm (9in.)
Power Requirements 100V - 120V / 220V - 240V ~50/60Hz
Power Consumption 1000W
Link Out RCA phono socket
Variable Low Pass Filter
Variable frequency: 40Hz to 160Hz
Variable slope: 12dB/oct, 18dB/oct, 24dB/oct / LFE mode: 350Hz, 18dB/oct
AUDIO CONNECTION QUALITY GUARANTEE
✔️Comprehensive three month warranty on Trade In's*
✔️Passed our checks for functionality
✔️A full inspection noting for any defects
✔️A full completeness check for all included parts and accessories
Generating expert take…
KEF traces its roots to 1961, when British engineer Raymond Cooke founded the company in a modest Nissen hut on the grounds of the Kent Engineering and Foundry in Maidstone, England. A former BBC engineer and Wharfedale veteran, Cooke was driven by a passion for music and a commitment to technological innovation, aiming to reproduce sound as faithfully as the original performance. From its inception, KEF pioneered materials like foil-stiffened polystyrene diaphragms and Melinex tweeters in its debut K1 loudspeaker, setting a benchmark for engineering precision that propelled the brand to early acclaim.
KEF has long specialized in loudspeakers, establishing itself as a leader with iconic innovations such as the Uni-Q coaxial driver and computer-aided design techniques that revolutionized driver and enclosure development. While drive units supplied to other manufacturers fueled its growth, the brand's core output remains high-fidelity speakers across categories like floorstanders, bookshelves, and home theater systems, including early THX-approved setups. Active wireless models and reference-grade series extend its portfolio, though it eschews amplifiers, turntables, DACs, headphones, or cables.
Renowned for its science-driven heritage, KEF occupies a premium position in the hi-fi market, blending accessible high-end performance with cutting-edge technology. Collectors prize vintage BBC monitors and Bextrene-driver classics, while modern buyers seek its precise, natural soundstaging. Decades of awards affirm KEF's status as a respected innovator, appealing to discerning audiophiles who value engineering over hype.
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