In this review, we will be comparing Model Three and 706 S2, two Passive Bookshelf speakers from KLH and Bowers Wilkins.
Let's have a brief look at the main features
of KLH Model Three and B&W 706 S2 first before getting into our more
detailed comparison.
| Key Specs | KLH Model Three | B&W 706 S2 |
|---|
| Brand | KLH
United States · founded 1957 | Bowers Wilkins
United Kingdom · founded 1966 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 1" | 1" Decoupled Soft-Dome |
|---|
| Woofer | 8" Pulp-Paper Cone | 6.5" Continuum |
|---|
| Frequency response | 46-20k Hz | 50-28k Hz |
|---|
| Sensitivity | 88 dB | 88 dB |
|---|
| Impedance | 6 ohms | 8 ohms |
|---|
| Power range | 30-150 watts | 30-120 watts |
|---|
| Weight | 13.20kg / 29lbs | 8.05kg / 17.7lbs |
|---|
| Dimensions (H x W x D) | 19.0" x 12.25" x 10.5"
482.0 x 311.0 x 267.0mm | 13.5" x 7.8" x 11.9"
340.0 x 200.0 x 301.0mm |
|---|
What size room are the KLH Model Three and B&W 706 S2 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* |
KLH Model Three |
B&W 706 S2 |
| 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.)
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
Both Model Three and 706 S2 are 2-way speakers.
KLH Model ThreeB&W 706 S2
TweeterWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
KLH Model Three |
B&W 706 S2 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 8-inch
|
1 x 6.5-inch
|
Model Three features a 1" Aluminum Tweeter and 1 x 8" Pulp-Paper Cone Woofer with a Crossover frequency at 1600Hz. On the other hand, the 706 S2 features a 1" Decoupled Soft-Dome Tweeter and 1 x 6.5" Continuum Woofer.
Frequency Response
Model Three has a frequency range of 46-20k Hz whereas 706 S2 has a frequency range of 50-28k Hz. With a minimum frequency of 46Hz, the Model Three can go slightly deeper then the 706 S2's min frequency of 50Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
Neither pair reaches down to 20Hz, the usual definition of full-range, which is normal for speakers of this size. If you want the bottom octave for movies or bass-heavy music, add a subwoofer to whichever you choose. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
Model Three is a 6 ohms speaker compared to the 706 S2 which has a nominal impedance of 8 ohms.
On the other hand, they have the same sensitivity of 88 dBdB.
Sensitivity
Bookshelf Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. Staying
within that range gives nominal performance; driving the speaker beyond its maximum wattage can damage it.
Model Three can handle a max power of 150 watts RMS, whereas 706 S2 has a max power handling value of 120 watts RMS, 30 watts less than the Model Three.
Note that higher power handling does not make a speaker louder: that depends mainly on
sensitivity and impedance. The calculator below shows how loud each of these actually plays
on a real amplifier.
Which plays louder on your amplifier?
Starting with a popular amplifier - change it to the one you own, or any you are
considering, and watch both numbers move.
Input Type and Bi-Amping / Bi-Wiring
706 S2 features Binding post posts which make bi-amping or bi-wiring possible. Model Three has a Binding post which doesn't feature bi-amping/bi-wiring.
KLH Model Three's Binding post terminals
Physical Specs
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare KLH Model Three's and B&W 706 S2's external dimensions. KLH Model Three has external dimensions of 482.0 x 311.0 x 267.0mm (19.0 x 12.25 x 10.5inch) whereas B&W 706 S2 has external dimensions of 340.0 x 200.0 x 301.0mm (13.5-inch x 7.8-inch x 11.-inch).
B&W 706 S2 is 111mm narrower and 142mm shorter than KLH Model Three but it is also 34mm deeper.
Size, drawn to scale
Both speakers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same surface and pushed back to the same wall, so the deeper one visibly sticks out further.
KLH Model Three needs about 38% more floor or shelf area. B&W 706 S2 is 34mm deeper, so it stands that much further out from the wall. KLH Model Three is 142mm 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 KLH Model Three is approximately 830.4cm2 / 128.7inch2 and base area of the B&W 706 S2 is approximately 602.0cm2 / 93.3inch2. The Model Three requires 38% more surface area than the 706 S2 which gives it a small disadvantage on placement in tight spaces.
Weight Comparison The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The KLH Model Three weighs 13.20kg / 29lbs and the B&W 706 S2 weighs 8.05kg / 17.7lbs. This makes the Model Three 64% heavier than the 706 S2.
Here is a comparison of how Model Three and 706 S2's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of KLH Model Three?
Here are the items that are included inside the box of Model Three:
- Floorstanding loudspeaker
- Riser base
- Grille
- Owners Manual
What's in the Box of B&W 706 S2?
Here are the items that come with the 706 S2:
- 2 Bookshelf loudspeakers
- 2 Grilles
- 2 Two-piece foam port plugs
- 8 Self-adhesive rubber feet
- 4 Jumper-straps
- Manual
- Bowers & Wilkins brochure
- Warranty Information
 Max Input Power |
150 watts
vs
120 watts
|
Handle more power from your amplifier |
 Woofer Size |
8 inches
vs
6.5 inches
|
Larger woofer |
|
Low Frequency Response |
46 Hz
vs
50 Hz
|
Generates deeper bass |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 High Frequency Response |
28k Hz
vs
20k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
340mm
vs
482mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
602cm2
vs
830cm2
|
Takes less floor space |
 Price per pair* |
1999USD
vs
2000USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
KLH Model Three |
Bowers & Wilkins 706 S2 |
| Brand |
KLH |
Bowers Wilkins |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
30-150 watts |
30-120 watts |
| Sensitivity |
88 dB |
88 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
3.7 ohms |
3.7 ohms |
| Frequency Response |
46-20k Hz |
50-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
8" |
6.5" |
| Woofer Composition |
Pulp-Paper Cone |
Continuum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
n/a |
Decoupled Soft-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
1600Hz |
n/a |
| Firing Direction |
n/a |
rear |
Physical Specs |
|
|
| Height |
482.0mm (19") |
340.0mm (13.4") |
| Width |
311.0mm (12.2") |
200.0mm (7.9") |
| Depth |
267.0mm (10.5") |
301.0mm (11.9") |
| Weight |
13.20kg (29lbs) |
8.05kg (17.7lbs) |
| Enclosure |
Acoustic Suspension |
Bass Reflex |
| Finish |
MDF/Wood Veneer |
MDF/Wood Veneer |
| Available Colors |
English Walnut, West African Mahogany |
Rosewood, Gloss Black, Satin White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
n/a |
24-26" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
Yes |
Other |
|
|
| Parts Warranty |
10 Years |
5 Years |
| Labor Warranty |
10 Years |
5 Years |
No single best speaker here - they are built to different priorities, and the right one depends on your room, your amplifier and what you listen to.
| Area | Better | Why |
|---|
| Bass | A | KLH Model Three digs deeper - 46Hz against 50Hz. A subwoofer would even that out. |
| Amplifier needs | evenly matched | Similar sensitivity (88dB vs 88dB) - both want much the same power. |
| Amplifier match | B | B&W 706 S2 is the easier load at 8 ohms. |
| Headroom | A | KLH Model Three takes more power (150W vs 120W) - more in hand in a big room. |
| Size | depends | B&W 706 S2 is easier to place; KLH Model Three is bigger, which usually goes with fuller bass. Your room decides. |
| Cabinet | depends | Sealed vs Ported. Sealed is tighter and happier near a wall; ported digs lower but wants space behind it. |
| Expandability | B | B&W 706 S2: bi-amping. B&W 706 S2 sits in a wider range (8 models), so a matched surround system is easier later. |
| Price | evenly matched | Much the same money ($2,000 vs $1,999 a pair). |
A KLH Model Three B B&W 706 S2
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Neither runs away with it - they trade advantages. Let the "depends" rows and your own room settle it. In a large or open-plan room, KLH Model Three has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, B&W 706 S2 is the easier speaker to get right.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.