KEF Reference 8b Subwoofer The KEF Reference 8b Subwoofer is a premium high-end subwoofer engineered for listeners who want deep, powerful bass with exceptional control and accuracy. Designed and hand-built in Maidstone, UK, this model combines refined craftsmanship with advanced acoustic engineering to deliver bass that is both impactful and precise. At the heart of the Reference 8b are twin 9-inch long-throw ultra-low distortion drivers, arranged in a force-cancelling back-to-back configuration. This design helps reduce cabinet vibration and unwanted resonance, allowing the subwoofer to reproduce low frequencies with greater clarity, weight and composure. Housed in a heavily braced, acoustically inert cabinet, the result is clean, articulate low-end performance that integrates beautifully into high-end stereo and home cinema systems. Power comes from two 500W Class D amplifiers, each dedicated to driving one of the custom bass units. With DSP-based control, the Reference 8b is able to deliver strong output, low distortion and accurate tuning across a wide low-frequency range. Whether you are building a reference-grade music system or a serious cinema room, this subwoofer is designed to provide effortless scale, depth and authority without sacrificing musical detail. The KEF Reference 8b also offers flexible connectivity, including RCA phono, analogue XLR, and speaker-level inputs, making it suitable for a wide range of high-performance setups. Adjustable crossover controls and LFE mode support further help optimise integration with main speakers and AV systems. For buyers seeking a luxury audiophile subwoofer with exceptional engineering, premium finish and commanding bass performance, the Reference 8b stands out as a flagship solution. Specification Details Product name KEF Reference 8b Subwoofer Type Twin 9-inch driver force-cancelling subwoofer Drivers 2 x 225 mm (9 in.) LF drivers Amplifier power 2 x 500 W Class D Amplifier design Switched mode power supply with DSP-based control section Frequency range Free Field: 18Hz (-6dB) Frequency response 24Hz at 90dB output in free-space mode (±3dB) Maximum output 110dB peak sound pressure level at 1m, 50Hz Inputs RCA phono sockets, analogue XLR socket, speaker-level inputs Link out RCA phono socket Variable low pass filter 40Hz to 160Hz Variable slope 12dB/oct, 18dB/oct, 24dB/oct LFE mode 350Hz, 18dB/oct Net internal volume 23L Dimensions (H x W x D) 398 x 365 x 429 mm Dimensions (imperial) 15.7 x 14.4 x 16.8 in. Weight 34kg (75 lbs.) Finish Deep Piano Black Power requirements 100V - 120V / 220V - 240V ~50/60Hz Power consumption 1000W Unit measurement Pair
