In this review, we will be comparing two different type of speakers by Bowers Wilkins. Bowers & Wilkins HTM71 S3 is a Center Channel speaker whereas the 706 S3 is a Bookshelf speaker.
Let's have a brief look at the main features
of B&W HTM71 S3 and B&W 706 S3 first before getting into our more
detailed comparison.
B&W HTM71 S3 Key Specs
- 3-way Design
- 1" Solid Body Soft-Dome Tweeter
- 4" Midrange
- 4 x 5" Aerofoil Profile Woofer
- 50-28k Hz Frequency Response
- 89 dB Sensitivity
- Impedance: 8ohms
- Power Range:30-200watts
- Weight:17.50kg
- Dimensions (H x W x D): 235.0" x 24-3/4" x 14"( 235.0 x 629.0 x 356.0mm )
B&W 706 S3 Key Specs
- 2-way Design
- 1" Decoupled Carbon Dome Tweeter
- 6.5" Continuum Woofer
- 50-28k Hz Frequency Response
- 88 dB Sensitivity
- Impedance: 8ohms
- Power Range:30-120watts
- Weight:8.42kg
- Dimensions (H x W x D): 345.0" x 7.6" x 13.1"( 345.0 x 192.0 x 334.0mm )
HTM71 S3 and 706 S3 are members of Bowers Wilkins's 700 S3 series of speakers. Below you can find the loudspeakers from this series.
What size room are the B&W HTM71 S3 and B&W 706 S3 speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:
| Listening Environment* |
B&W HTM71 S3 |
B&W 706 S3 |
| Near-field |
Poor |
Poor |
| Small Room |
Average |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Average |
Average |
| Very Large Room |
Poor |
Poor |
(* 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.)
In the following sections, we will get into more detail in order to better understand how the B&W HTM71 S3 and B&W 706 S3 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Drivers
One of the fundamental differences between these two speakers is that HTM71 S3 is a 3-way design whereas the 706 S3 is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
B&W HTM71 S3 |
B&W 706 S3 |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 4-inch |
- |
|
Woofer
|
4 x 5-inch
|
1 x 6.5-inch
|
HTM71 S3 features a 1" Decoupled Carbon Solid Body Soft-Dome Tweeter , a 4" Midrange and 4 x 5" Aerofoil Profile Woofer . On the other hand, the 706 S3 features a 1" Decoupled Carbon Dome Tweeter and 1 x 6.5" Continuum Woofer .
Frequency Response
HTM71 S3 and 706 S3 has exactly the same frequency range of 50-28k Hz.
Below graphs depict how these two speakers compare with the max, min and average values of the Min and Max Frequencies of other speakers in the Center Channel class in our database.
Low Frequency
Center Channel Speakers
High Frequency
Center Channel Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
HTM71 S3 and 706 S3 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. HTM71 S3 sensitivity is rated at 89 dB and the 706 S3's is at 88 dB. This 1 dB difference makes the B&W HTM71 S3 a more sensitive speaker compared to B&W 706 S3, hence will play louder with the same amount of watts.
Sensitivity
Center Channel Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
HTM71 S3 can handle a max power of 200 watts RMS from the amp the whereas 706 S3 has a max power handling value of 120 watts RMS, 80 watts less than the HTM71 S3.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
Both HTM71 S3 and 706 S3 features dual binding post speaker terminals for bi-amping or bi-wiring.
B&W HTM71 S3's Binding post terminals allows Bi-amping or bi-wiring
B&W 706 S3's Binding post terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Both HTM71 S3 and 706 S3 have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
Physical Specs
Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare B&W HTM71 S3's and B&W 706 S3's external dimensions. B&W HTM71 S3 has external dimensions of 235.0 x 629.0 x 356.0mm ( 9-1/4inch x 24-3/4inch x 14inch ) whereas B&W 706 S3 has external dimensions of 345.0 x 192.0 x 334.0mm ( 13.6-inch x 7.6-inch x 13.1-inch) .
B&W 706 S3 is 437mm narrower and 22mm less deeper than B&W HTM71 S3 but it is also 110mm taller.
Base Surface Area Comparison
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base surface area of the B&W HTM71 S3 is approximately 2239.2cm2 / 347.1inch2 and base area of the B&W 706 S3 is approximately 641.3cm2 / 99.4inch2. The HTM71 S3 requires 249% more surface area than the 706 S3 which gives it a small disadvantage on placement in tight spaces.
What's in the Box of B&W HTM71 S3?
Here are the items that are included inside the box of HTM71 S3:
Center-channel loudspeakerGrilleTwo-piece foam port plug4 Self-adhesive rubber feet4 Jumper-straps (pre-installed)ManualBowers & Wilkins brochureWarranty InformationOnline Registration Card
What's in the Box of B&W 706 S3?
Here are the items that come with the 706 S3:
2 Bookshelf loudspeakers2 Grilles2 Two-piece foam port plugs8 Self-adhesive rubber feet4 Jumper-straps Manual Bowers & Wilkins brochureWarranty Information
Max Input Power 
Driver Setup 
Sensitivity 
Number of Woofers 
Height 
Base Surface Area 
Price per pair*