Key Specs
- Speaker Type: Center channel
General
- Brand: Bowers & Wilkins
- Model Number: HTM81 D4 GLOSS BLACK
- Product Name: HTM81 D4 Diamond 1" Diamond Tweeter, 6" Midrange, Dual 8" Woofer Center Channel Speaker (each)
- Color: Gloss Black
Audio
- Speaker Type: Center channel
- Peak Power Handling: 500 watts (The maximum amount of power an electronic device, like a speaker, can handle without damage. This refers to short bursts of power, while root mean square (RMS) power handling indicates the amount of continuous power a device can sustain. Higher levels of distortion can also occur at peak power levels when the device is powered beyond its recommended usage.)
- Impedance: 8 ohms (Describes the resistance of an electric signal throughout the system. Devices with low impedance require less power to deliver optimal signals but are more at risk for damage from overloading. Higher impedance requires more power but is more protected from overload damage.)
- Minimum Frequency Response: 35 hertz (Describes the maximum range of frequencies or musical tones a product can reproduce, from very low tones to very high treble tones. The minimum frequency or musical tone the speaker can reproduce. High treble tones have higher frequencies while low tones and deep bass have lower frequencies.)
- Maximum Frequency Response: 20 kilohertz (Describes the maximum range of frequencies or musical tones a product can reproduce, from very low tones to very high treble tones. The maximum frequency or musical tone the speaker can reproduce. High treble tones have higher frequencies while low tones and deep bass have lower frequencies.)
- Sensitivity: 90 decibels
- High Resolution Audio: true (Hear music the way musicians and sound technicians intended it to be heard. Products that support hi-res audio deliver audio signals with a dynamic range and bandwidth far greater than that of a standard CD so you'll be able to enjoy pure music with outstanding sound quality. The device supports high-resolution audio signals, which more closely resemble the quality of music as it was originally recorded, with more texture and detail than can be heard via typical music streaming services or CDs.)
- Number of Speakers: 1
- Number of Tweeters: 1
- Tweeter Size: 1 inches
- Number of Midranges: 1
- Midrange Size: 6 inches
- Number of Drivers: 4
- Number of Woofers: 2
- Woofer Size: 8 inches
Connectivity
- Speaker Connectivity: Wired
- Wireless Multi-Room Audio: false (Technology that allows multiple speakers and/or soundbars to be connected wirelessly and play audio in separate rooms.)
- Audio Only Inputs: No audio only inputs
- Network Connector(s): No network connectors
- Speaker Wire Connection Type: Binding posts
Features
- Indoor Or Outdoor Use: Indoor (Indicates the appropriate environment product was designed to be used in.)
Dimensions
- Product Height: 13.31 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
- Product Width: 33.35 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
- Product Depth: 14.61 inches (The out of box depth of the item. Depth is measured as the distance from the front of the item to the back as it would be primarily used or placed.)
- Product Weight: 71 pounds (The out of box weight of the item.)
Warranty
- Warranty - Parts: 5 years
- Warranty - Labor: 5 years
Other
- UPC: 714346334209

Our largest center channel speaker is designed to partner the 801 D4 and 802 D4. Featuring larger drive units than the HTM82 D4, it’s a powerful and whole-hearted performer, with both bass power and midrange extension that perfectly matches the quality of its illustrious stablemates. A dedicated aluminium midrange enclosure enhances dialog intelligibility. Available with an optional matching FS-HTM D4 floorstand for the perfect installation.

Diamond Dome Tweeter: Prized in highly specialised industrial applications, the unique properties of diamond make for a near-perfect tweeter material. Our diamond domes are grown like crystals in super-heated furnaces under laboratory conditions before being cut to produce our tweeter domes.
Solid Body Tweeter: Precisely milled from a single billet of aluminum to better resist resonance, the improved tweeter enclosure features an elongated form with a longer tube-loading system. You'll experience more open high frequencies from the diamond tweeter.
Continuum Cone: Continnum is a woven composite that blends control with flexibility. The result is breathtaking clarity. Hear voices, guitars and bass instruments with precision and transparency.
Biomimetic Suspension: Our all-new Biomimetic Suspension revolutionises midrange cone performance by greatly reducing the unwanted air pressure and coloration that a conventional fabric spider can generate. The result? Midrange transparency you wouldn’t believe possible.
Midrange Enclosure: Inside HTM81 D4, we use a stiff, aluminium enclosure designed to maximise the performance of the midrange drive unit. It provides a controlled location point for the midrange decoupling and prevents unwanted air leakage into the surrounding cabinet.
Aerofoil Bass: Advanced computer modeling, carbon fiber and a syntactic core are used to produce a cone with maximum stiffness where it’s needed most. This optimised shape means the cone displays pistonic behaviour further up the audible range, producing precise, controlled and utterly lifelike bass.
Reverse Wrap Cabinet: The front and sides of the cabinet are formed in one continuous curve, held together with a spine of solid aluminium. The curved front means less baffling around the drive units so you'll enjoy greater dispersion and less cabinet reflection for a more holographic sound.
Matrix Bracing: Interlocking solid plywood panels with aluminium bracing reinforce loudspeaker cabinet walls at key stress points. This reduces cabinet resonances so you can enjoy all of the fine midrange and bass details in your music and movies.
Magnetic grille: Remains acoustically transparent while protecting the speaker's components.
Diamond Dome Tweeter: Prized in highly specialised industrial applications, the unique properties of diamond make for a near-perfect tweeter material. Our diamond domes are grown like crystals in super-heated furnaces under laboratory conditions before being cut to produce our tweeter domes.
Solid Body Tweeter: Precisely milled from a single billet of aluminum to better resist resonance, the improved tweeter enclosure features an elongated form with a longer tube-loading system. You'll experience more open high frequencies from the diamond tweeter.
Continuum Cone: Continnum is a woven composite that blends control with flexibility. The result is breathtaking clarity. Hear voices, guitars and bass instruments with precision and transparency.
Biomimetic Suspension: Our all-new Biomimetic Suspension revolutionises midrange cone performance by greatly reducing the unwanted air pressure and coloration that a conventional fabric spider can generate. The result? Midrange transparency you wouldn’t believe possible.
Midrange Enclosure: Inside HTM81 D4, we use a stiff, aluminium enclosure designed to maximise the performance of the midrange drive unit. It provides a controlled location point for the midrange decoupling and prevents unwanted air leakage into the surrounding cabinet.
Aerofoil Bass: Advanced computer modeling, carbon fiber and a syntactic core are used to produce a cone with maximum stiffness where it’s needed most. This optimised shape means the cone displays pistonic behaviour further up the audible range, producing precise, controlled and utterly lifelike bass.
Reverse Wrap Cabinet: The front and sides of the cabinet are formed in one continuous curve, held together with a spine of solid aluminium. The curved front means less baffling around the drive units so you'll enjoy greater dispersion and less cabinet reflection for a more holographic sound.
Matrix Bracing: Interlocking solid plywood panels with aluminium bracing reinforce loudspeaker cabinet walls at key stress points. This reduces cabinet resonances so you can enjoy all of the fine midrange and bass details in your music and movies.
Magnetic grille: Remains acoustically transparent while protecting the speaker's components.