HTM81 D4

Center speaker

This is not just another speaker range. Each new generation of 800 Series Diamond is a landmark event for Bowers & Wilkins. This is our benchmark, our icon; the most advanced range of loudspeakers we know how to make. For us, the 800 Series Diamond is everything we know, and everything we are.

Our largest centre-channel speaker is designed to be the perfect partner for the 801 04 or 802 04. Small wonder, then, that it's such a powerful performer, with sound that perfectly matches the quality of its illustrious stablemates.

Inside HTM81 04, we use a stiff, aluminium enclosure designed to maximise the performance of the midrange drive unit. lt provides a controlled location point for the midrange decoupling and prevents unwanted air leakage into the surrounding cabinet.

Our Aerofoil bass cone technology remains an outstanding solution to the conundrum of combining low mass and high stiffness, thanks to its carbon-fibre skin and variable-profile foam core. Now, we have added the foam Anti-Resonance Plug™ for lower distortion and even cleaner bass.

• Description: 3-way vented-box system
• Drive units: 1x ø 25 mm (1") diamond dome high-frequency, 1x ø 150 mm (6") Continuum cone FST midrange, 2x ø 200 mm (8") Aerofoil cone bass units
• Frequency range: 20 Hz to 35 kHz
• Frequency response (±3 dB from reference axis): 28 Hz to 28 kHz
• Sensitivity (on axis at 2.83 Vrms at 1 m): 90 dB
• Harmonic distortion: 2nd and 3rd harmonics (90 dB, 1 m on axis), <1% 80 Hz - 20 kHz, <0.3% 100 Hz - 20 kHz
• Nominal impedance: 8 Ω (minimum 3.0 Ω)
• Recommended amplifier power: 50 W - 500 W into 8 Ω on unclipped programme
• Max. recommended cable impedance: 0.1 Ω