KEF Reference 8b Subwoofer

🧾 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

📦 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.