🧾 Overview The KEF Reference 8b Subwoofer is a flagship, high-performance active subwoofer engineered to produce exceptionally deep and controlled bass with minimal distortion. Built around twin long-throw 228 mm (9-inch) drivers driven by dual 500 W Class D amplifiers in a force-cancelling, heavily braced enclosure, it delivers refined low-frequency extension and effortless impact for music and home cinema systems. ✅ Key Features ✅ Twin 228 mm (9-inch) long-throw subwoofer drivers for deep, authoritative bass ✅ Dual 500 W Class D amplifiers with DSP control for precision and low distortion ✅ Force-cancelling back-to-back driver configuration for reduced cabinet vibration and cleaner output ✅ Variable low-pass filter with adjustable frequency (40 Hz–160 Hz) and slope (12 dB/18 dB/24 dB per octave) ✅ LFE mode option with dedicated configuration for home theatre integration ✅ Multiple input options: balanced XLR, RCA phono, and speaker-level inputs ✅ High maximum output of 110 dB (peak SPL at 1 m, 50 Hz) for dynamic impact ✅ Hand-built enclosure in Deep Piano Black with inert, braced structure 📊 Technical Specifications ▼ Parameter Value Type Active force-cancelling subwoofer Drive Units 2 × 228 mm (9-inch) long-throw LF drivers Amplifier 2 × 500 W Class D with DSP control Frequency Range (free field, −6 dB) 18 Hz Frequency Response (±3 dB) 24 Hz at 90 dB output in free space Maximum Output 110 dB (peak SPL @ 1 m, 50 Hz) Inputs Balanced XLR; RCA phono; Speaker-level Link Out RCA phono socket Variable Low-Pass Filter 40 Hz – 160 Hz; slopes: 12 dB/18 dB/24 dB/oct; LFE mode Net Internal Volume 23 L Weight 34 kg Dimensions (H × W × D) 398 × 365 × 429 mm Finish Deep Piano Black Power Requirements 100 V – 120 V / 220 V – 240 V ~50/60 Hz Power Consumption 1000 W 📦 What’s in the Box 📦 KEF Reference 8b Subwoofer (1 unit) 🔌 Power cable (region-specific) 📖 Owner’s manual and documentation pack 📦 Warranty card 🔄 Compatibility The Reference 8b is compatible with high-end stereo and home theatre systems: connect via balanced XLR, unbalanced RCA, or speaker-level inputs. The variable low-pass filter and LFE mode allow integration with AV receivers, pre/pro processors, and amplifiers. Ideal for both music and cinematic bass roles when paired with high-performance loudspeakers. 📦✈️ Shipping & Returns 📦 Insured worldwide delivery 🔄 14-day return policy 🛡️ 2-year EU warranty 📝 Reviews “Even for its price, the Reference 8b delivers deep, tight bass with great control in both music and movies.” — AVForums user review “A refined subwoofer with excellent build quality and versatility of inputs; integrates well in reference systems.” — What Hi-Fi community comment “Able to reach 110 dB with authority, it adds serious low-end weight without sounding muddy.” — Home Theater Enthusiast forum discussion ⚠️ Warning ⚠️ Warning: The Reference 8b Subwoofer may cause sudden rearrangement of furniture, unexpected bass-shaking dance sessions at 2 a.m., and an irresistible urge to measure room modes with a ruler and SPL meter. You have been warned.
