Bowers & Wilkins HTM81 D4 is a 3-way Passive Bass Reflex Center Channel speaker by Bowers Wilkins. It was released in September 2021. Center channel speaker is an important component of a home theater system set-up as it delivers the listener significant part of the on-screen dialogue from your television. It features a 1" Diamond dome Tweeter, 1 x 6" Midrange and 2 x 8" Aerofoil Woofer.
The larger D4 centre, built from the 802 D4 driver set: a 150 mm Continuum FST midrange between two 200 mm Aerofoil bass drivers, 847 mm wide and 32 kg.
The speaker has a frequency range of 28-28k Hz and a sensitivity of 90 dB. Bowers & Wilkins HTM81 D4 has an MSRP of 10500$.
Room Size Suitability
The size of the room where you plan to use the Bowers & Wilkins HTM81 D4 is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:
| Listening Environment* |
Suitability |
| Near-field | Bad |
| Small Room | Poor |
| Mid-size Room | Average |
| Large Room | Good |
| Very Large Room | Average |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2, Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: > 400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual listening experience changes depending on floor height, room shape, surface materials, listening position, speaker locations, etc.)
Bowers Wilkins's 800 D4 Series of Loudspeakers
HTM81 D4 is a member of Bowers Wilkins's 800 D4 series of Passive speakers. Below you can see the main specs of these speakers.
See all 7 Bowers Wilkins 800 D4 models compared »
Bowers Wilkins 800 D4 Series Speakers
Frequency Response of the Bowers & Wilkins HTM81 D4 Speaker
Bowers & Wilkins HTM81 D4 has a Frequency response range of 28-28k Hz and Power Range of 50-500 watts.
Here we have a comparison of how HTM81 D4's Low frequency value compares with the average, max and min Low frequency values in its class.
Low Frequency
Center Channel Speakers
Bowers & Wilkins HTM81 D4
Impedance and Sensitivity
Bowers & Wilkins HTM81 D4's nominal impedance level is
8 ohms but can go down to as low as
3.0 ohms, and has a sensitivity of
90 dB.
Sensitivity
Center Channel Speakers
Bowers & Wilkins HTM81 D4
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Bowers & Wilkins HTM81 D4 is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
90dB of the Bowers & Wilkins HTM81 D4 is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise. Work out how loud the Bowers & Wilkins HTM81 D4 plays in your room →
Minimum Impedance of the Bowers & Wilkins HTM81 D4
Even though the nominal impedance of the HTM81 D4 is 8 ohms, the minimum impedance level of this speaker according to Bowers Wilkins is 3.0 ohms Bowers & Wilkins HTM81 D4 so while choosing an amplifier, you should ideally check if the unit you are considering can provide this impedance level.
What amplifier does the Bowers & Wilkins HTM81 D4 need?
At normal listening levels in a medium room, about
7.5–120 W
per channel into 8 ohms.
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Input Type
HTM81 D4 has Binding post type connectors and lets bi-amping/bi-wiring. Bi-wiring can enhance the overall transparency of your loudspeakers by using separate speaker wires for the low and high-frequency drivers from a single amplifier. Bi-amping, on the other hand, involves using separate amplifiers for the high and low-frequency drivers, potentially resulting in a greater dynamic range and reduced distortion.
Work out what gauge speaker cable this run needs →
Bowers & Wilkins HTM81 D4 External Dimensions and Weight
Bowers & Wilkins HTM81 D4 has external dimensions of (Height x Width x Depth) 13-1/8 x 33-3/8 x 14-5/8inch (334.0 x 847.0 x 371.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of Bowers & Wilkins HTM81 D4 is approximately 3142.4cm2 / 487.1inch2.
Find speakers that fit your shelf or alcove →
WeightThe Bowers & Wilkins HTM81 D4 weighs 32.20kg / 70.8lbs per piece. Here is a comparison of how HTM81 D4's weight compares with the average, max and min weights in its class.
Weight
All Center Channel Speakers
Bowers & Wilkins HTM81 D4
Weight
Center Channel Speakers under $20000
Bowers & Wilkins HTM81 D4
Cabinet type and Materials
Bowers & Wilkins HTM81 D4 has a
Bass Reflex type cabinet. Bass Reflex type loudspeakers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs.
Port Position
Bowers & Wilkins HTM81 D4 is a rear-firing port speaker so you have to make sure you leave enough space between the back of the speaker and wall or bookshelf so that it has room to breathe.
Does the Bowers & Wilkins HTM81 D4 come with a Grille?
HTM81 D4 comes with grilles. The purpose of the grille is to protect the delicate driver elements from external impacts while still allowing the sound to pass as clearly as possible.
Recommended Accessories
Here is a list of accessories that we think you may need for the Bowers & Wilkins HTM81 D4.
Official Product Page
Official manufacturer's product page for the Bowers & Wilkins HTM81 D4 speaker can be found below:
Official Product Page for Bowers & Wilkins HTM81 D4
Warranty
5 Years of parts warranty and 5 Years of labor warranty is generally provided by the manufacturer.