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![HTM81-D4 in Black](https://www.bowerswilkins.com/dw/image/v2/BGJH_PRD/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw4b8e58b1/bowers/PDP/HTM81-D4/HTM81-D4-Black/HTM81-D4-Black_Image_1.png?sw=2160)
HTM81 D4
Our largest center-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.
- Diamond Tweeter
- Solid body Tweeter-on-Top
- Continuum™ Cone FST
- Anti-Resonance Plug
- Biomimetic Suspension
- Matrix™
- Aerofoil™ Cone Bass Units
- Flowport™
-
In Stock
HTM81 D4
HTM81 D4
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![Aerofoil bass cone Aerofoil bass cone](https://www.bowerswilkins.com/on/demandware.static/-/Sites-master-catalog-soundunited/default/dwf5451faa/bowers/PDP/5050update/801-D4-Bass-Unit-Plan-View-min.png)
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-fiber 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.
![Diamond dome tweeter Diamond dome tweeter](https://www.bowerswilkins.com/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw5c384241/bowers/PDP/5050update/Solid-Body-Tweeter-Assembly-Front-View-min.png)
![Aluminum bass pods Aluminum bass pods](https://www.bowerswilkins.com/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw653844ae/bowers/PDP/5050update/Aluminium-Bass-Pod-min.png)
Aluminum bass pods
HTM81 D4 mounts two Aerofoil bass cones in twin solid aluminum bass pods, each of which is clamped into an aluminum 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.
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Experience True Sound with official Bowers & Wilkins retailers.
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Setting new standards of performance
![HTM81-D4 in Black](https://www.bowerswilkins.com/dw/image/v2/BGJH_PRD/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw4b8e58b1/bowers/PDP/HTM81-D4/HTM81-D4-Black/HTM81-D4-Black_Image_1.png?sw=360)
1x 150mm (6 in) Continuum cone FST midrange
2x 200mm (8 in) Aerofoil cone bass
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw5bc35c49/swatches/black.png)
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw5a3e43a0/swatches/white.png)
1x 130mm (5 in) Continuum cone FST midrange
2x 165mm (6.5 in) Aerofoil cone bass
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw5bc35c49/swatches/black.png)
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw1a2f700b/swatches/mocha.png)
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw5a3e43a0/swatches/white.png)
1x 130mm (5 in) Continuum cone FST midrange
2x 130mm (5 in) Aerofoil Profile bass
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw5bc35c49/swatches/black.png)
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw1a2f700b/swatches/mocha.png)
![](/on/demandware.static/-/Sites-master-catalog-soundunited/default/dw5a3e43a0/swatches/white.png)
2x 130mm (5 in) Continuum cone bass/midrange