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Bowers & Wilkins HTM81 D4 - 3-Way Centre Speaker

Key Features

  • 3-Way Centre Channel Design
    Utilizes dedicated drivers for low, mid, and high frequencies to deliver clear, detailed, and balanced sound reproduction — especially for dialogue and on-screen effects in home theatre systems.

  • Decoupled Double-Dome Tweeter
    Provides smooth, extended highs with excellent clarity and minimal distortion, enhancing vocal detail and spatial cues.

  • Dedicated Midrange Driver
    Offers transparent, natural midrange performance for clear dialogue and nuanced soundtracks.

  • Dedicated Bass Driver
    Delivers controlled, deeper low-frequency output that supports dynamic soundtracks and integrates well with subwoofers.

  • Optimized Crossover Network
    Precisely shapes frequency transitions between drivers for coherent, balanced audio across the spectrum.

  • Wide Sound Dispersion
    Designed for broad and consistent sound coverage, ensuring uniform performance throughout the listening area.

  • Rigid, Low-Resonance Cabinet
    Solidly constructed enclosure reduces unwanted vibration and coloration for accurate sound reproduction.

  • Elegant, Premium Finish
    High-quality design that complements modern home theatre systems both sonically and aesthetically.

  • Enhanced Dialogue Clarity
    Tuned specifically to reproduce speech with excellent intelligibility and presence.

  • Seamless System Integration
    Matches the tonal signature and performance of Bowers & Wilkins 800 Series speakers for cohesive surround sound setups.

Description

HTM81 D4

Our largest centre-channel speaker is designed to partner the 801 D4 and 802 D4. A powerful performer, it has both the scale and the midrange extension to perfectly match the quality of its illustrious stablemates.

* Stand(s) not included.

At the centre of it all

The centre-channel speaker is arguably the most important in home theatre – and the HTM81 D4 has an enviable array of advanced technologies to reinforce that point, including Solid Body tweeter-on-top, a decoupled Continuum™ Cone midrange drive unit and twin 200mm (8-in) Aerofoil™ bass cones.

Aerofoil bass cone

Our Aerofoil bass cone technology remains an outstanding solution to the conundrum of combining low mass and high stiffness in bass cones, 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.

Diamond dome tweeter

One of our most significant accomplishments over the past two decades, the ultra-stiff, supremely accurate Diamond dome tweeter is the perfect combination of low mass, exceptional stiffness and outstanding accuracy. 15 years after we introduced it, we haven’t found a better tweeter dome technology.

Aluminium bass pods

HTM81 D4 mounts two Aerofoil bass cones in twin solid aluminium bass pods, each of which is clamped into an aluminium plate fixed to the stiffest part of its curved cabinet. Formed as single pieces of metal, these stiff structures provide the perfect mechanical location for those powerful bass cones.

The science of sound

Innovation is at the heart of everything we do. We question, we examine, we understand and then we evolve. We use computer modelling to explore and reimagine every aspect of loudspeaker design. Learn more about all the technologies that combine to make 800 Series Diamond™ so special here.

 

 Specifications

Size & weight

Dimensions
Height: 334mm (13.1 in)
Width: 847mm (33.3 in)
Depth: 371mm (14.6 in)
Net weight
32.20kg (71 lb)

Technical Details

Technical features
Diamond tweeter
Solid body Tweeter-on-Top
Continuum™ cone FST
Anti-Resonance plug
Biomimetic Suspension
Matrix™
Aerofoil™ cone bass units
Flowport
Description
3-way vented-box system
Drive units
1x ø25mm (1in) Diamond dome high-frequency
1x ø150mm (6in) Continuum cone FST midrange
2x ø200mm (8in) Aerofoil cone bass units
Frequency range
20Hz to 35kHz
Frequency response
28Hz to 28kHz (+/-3dB from reference axis)
Sensitivity
90dB (on axis at 2.83Vrms at 1m)
Harmonic distortion
2nd and 3rd harmonics (90dB,1m on axis)
<1% 80Hz – 20kHz
<0.3% 100Hz – 20kHz
Nominal impedance
8Ω (minimum 3.0Ω)
Recommended amplifier power
50W – 500W into 8Ω on unclipped programme
Max recommended cable impedance
0.1Ω

 

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