The C15 is a two-way bass-reflex design built around a 110mm main driver with a die-cast chassis, polypropylene cone, and 32mm-diameter voice coil, paired with a KEF tweeter in a compact enclosure finished in black wood veneer. The bass-reflex loading extends low-frequency output to a quoted 68Hz, which is respectable for a speaker of this size and contributes to a fuller presentation than the compact dimensions might suggest.
With a sensitivity of 85dB and a nominal impedance of 4 ohms, the C15 is a relatively demanding loudspeaker that benefits from partnering with a capable amplifier. KEF recommends an amplifier of between 10 and 60 watts, though the 4-ohm load and moderate sensitivity mean that an amplifier with a solid power supply and comfortable 4-ohm capability will extract the best from these speakers. The compact dimensions — just 265mm high by 180mm wide — make the C15 well-suited to smaller rooms, desktop systems, or as surround speakers in a multi-channel setup, though placement on dedicated stands is recommended for optimum stereo imaging.
Technical Specifications (Source: HiFi Review)
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Type: Two-way bass-reflex bookshelf loudspeaker
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Driver Complement: 110mm (4.3″) polypropylene-cone woofer with die-cast chassis and 32mm voice coil; KEF tweeter
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Frequency Response: 68Hz – 20kHz (±3dB)
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Nominal Impedance: 4 ohms
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Sensitivity: 85dB (2.83V/1m)
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Recommended Amplifier Power: 10 – 60W
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Dimensions (H x W x D): 265 x 180 x 150 mm
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Weight: 3.2 kg per speaker
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Year of Production: c. 1985
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Country of Origin: England
Important Owner’s Notes
The KEF C15 presents a 4-ohm nominal impedance, which places greater demands on the partnering amplifier than a conventional 8-ohm design. We recommend using an amplifier that is stable into 4-ohm loads and has sufficient current delivery to drive these speakers comfortably.
Why Buy From Us
With over 40 years of experience in the Hi-Fi industry, we are well placed to assess and test equipment of this type. Every item we list is fully inspected and tested before sale — this unit was checked by Callum in our workshop.
When you buy from us you can expect:
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Full inspection and testing prior to listing — not simply a visual check
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A 3-month guarantee on every item we sell
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Transparent descriptions with no omissions
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Professional packaging to ensure safe delivery
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After-sales support available by phone or email should you have any questions
Summary
The KEF C15 is a compact and capable British bookshelf loudspeaker from the mid-1980s, offering KEF’s characteristic balanced presentation in a small, room-friendly enclosure. This matched pair is in great condition with minor marks consistent with age. Stands are not included. This is a matched pair listed as a single lot. Please feel free to get in touch with any questions prior to purchase.
