Product details

DESCRIPTION

Exceptional Bass Precision. Zero Distortion.

The Reference 8b is KEF’s flagship subwoofer a masterpiece of engineering designed to deliver deep, controlled, and distortion‑free bass. Featuring two 9‑inch long‑throw drivers in a force‑cancelling configuration, each powered by its own 500W Class‑D amplifier, the Reference 8b produces astonishing low‑frequency performance with absolute authority.

Whether paired with KEF Reference loudspeakers or integrated into a high‑end home theatre, the 8b delivers bass that is tight, accurate, and effortlessly powerful.


Force‑Cancelling Architecture

At the heart of the Reference 8b is KEF’s advanced force‑cancelling design, where two drivers are mounted back‑to‑back inside a heavily braced, acoustically inert cabinet.

This configuration provides:

  • Zero cabinet vibration
  • Ultra‑low distortion
  • Clean, controlled bass
  • Effortless dynamic impact

The result is bass that feels powerful yet perfectly balanced.

SPECIFICATION

Weight

  • 34 kg (75 lbs.)

Dimensions

  • H × W × D: 398 × 365 × 429 mm (15.7 × 14.4 × 16.8 in.)

Unit Measurement

  • Pair

Finishes

  • Deep Piano Black

Inputs

  • RCA phono sockets
  • Analog XLR socket
  • Speaker‑level inputs

Frequency Performance

  • Frequency range (free field, -6dB): 18Hz
  • Frequency response: 24Hz at 90dB output in free‑space mode (±3dB)

Net Internal Volume

  • 23L

Maximum Output

  • 110dB (peak SPL at 1m, 50Hz)

Amplifier

  • 2 × 500W Class‑D amplifiers
  • Switched‑mode power supply
  • DSP‑based control section

Drive Units

  • LF: 2 × 225 mm (9 in.)

Power Requirements

  • 100V – 120V / 220V – 240V ~ 50/60Hz

Power Consumption

  • 1000W

Link Out

  • RCA phono socket

Variable Low‑Pass Filter

  • Frequency: 40Hz – 160Hz
  • Slopes: 12dB/oct, 18dB/oct, 24dB/oct
  • LFE mode: 350Hz, 18dB/oct

Downloads

  • Reference 8b Manual
  • Reference Manual
  • Reference Information Sheet
  • Reference White Paper
  • Reference Brochure

Design. Sound. Smart Living