In this review, we will be comparing 607 S3 and Q150, two Passive Bookshelf speakers from Bowers Wilkins and KEF.
Let's have a brief look at the main features
of B&W 607 S3 and KEF Q150 first before getting into our more
detailed comparison.
B&W 607 S3 Key Specs
- 2-way Design
- 1" Decoupled Double Dome Titanium Tweeter
- 5" Continuum Woofer
- 52-28k Hz Frequency Response
- 84 dB Sensitivity
- Impedance: 8ohms
- Power Range:30-100watts
- Weight:4.65kg
- Dimensions (H x W x D): 300.0" x 6.5" x 9.3"( 300.0 x 166.0 x 235.0mm )
KEF Q150 Key Specs
- 2-way Design
- 11th Generation Uni-Q Driver
- 1" Dome Tweeter
- 5.25" Aluminum Woofer
- 51-28k Hz Frequency Response
- 86 dB Sensitivity
- Impedance: 8ohms
- Power Range:10-100watts
- Weight:5.60kg
- Dimensions (H x W x D): 303.0" x 7.0" x 10.9"( 303.0 x 180.0 x 278.0mm )
What size room are the B&W 607 S3 and KEF Q150 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 607 S3 |
KEF Q150 |
| Near-field |
Average |
Average |
| Small Room |
Good |
Good |
| Mid-size Room |
Average |
Average |
| Large Room |
Poor |
Poor |
| Very Large Room |
Bad |
Bad |
(* 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 607 S3 and KEF Q150 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking
through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both 607 S3 and Q150 are 2-way speakers.
| Driver |
B&W 607 S3 |
KEF Q150 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 5-inch
|
1 x 5.25-inch
|
607 S3 features a 1" Titanium Decoupled Double Dome Titanium Tweeter and 1 x 5" Continuum Woofer . On the other hand, the Q150 features a 1" vented aluminum Dome Tweeter and 1 x 5.25" Aluminum Woofer with a Crossover frequency at 2500Hz.
Frequency Response
607 S3 has a frequency range of 52-28k Hz whereas Q150 has a frequency range of 51-28k Hz. With a minimum frequency of 51Hz, the Q150 can go slightly deeper then the 607 S3's min frequency of 52Hz.
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 Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf 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
607 S3 and Q150 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. 607 S3 sensitivity is rated at 84 dB and the Q150's is at 86 dB. This 2 dB difference makes the KEF Q150 a more sensitive speaker compared to B&W 607 S3, hence will play louder with the same amount of watts.
Sensitivity
Bookshelf 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.
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
607 S3 features Binding post posts which make bi-amping or bi-wiring possible. Q150 has a Post which doesn't feature bi-amping/bi-wiring.
B&W 607 S3's Binding post terminals allows Bi-amping or bi-wiring
KEF Q150's Post terminals
Cabinet Type and Port Position
Both 607 S3 and Q150 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.
KEF Q150 Port
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 607 S3's and KEF Q150's external dimensions. B&W 607 S3 has external dimensions of 300.0 x 166.0 x 235.0mm ( 11.8 x 6.5 x 9.3inch) whereas KEF Q150 has external dimensions of 303.0 x 180.0 x 278.0mm ( 11.9 x 7.0 x 10.9inch) .
KEF Q150 is clearly the larger of the two speakers. Its body is 14mm wider, 3mm taller and 43mm deeper than B&W 607 S3.
Below you can see the front view size comparison of B&W 607 S3 and KEF Q150 in scale.
Comparison image of B&W 607 S3 and KEF Q150 Size and External Dimensions
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 607 S3 is approximately 390.1cm2 / 60.5inch2 and base area of the KEF Q150 is approximately 500.4cm2 / 77.6inch2. The 607 S3 requires 22% less surface area than the Q150 which gives it a small advantage on placement in tight spaces.
Here is an another comparison that shows both speakers on a BDI Octave Media Cabinet, next to a standard size amplifier and turntable in scale:
Size Comparison image of B&W 607 S3 and KEF Q150 on a Media Console
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 B&W 607 S3 weighs 4.65kg / 10.2lbs and the KEF Q150 weighs 5.60kg / 12.3lbs. This makes the Q150 20% heavier than the 607 S3.
Here is a comparison of how 607 S3 and Q150's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of B&W 607 S3?
Here are the items that are included inside the box of 607 S3:
2 Bookshelf loudspeakers 2 Grilles 2 Two-piece foam port plugs 8 Self-adhesive rubber feet 4 Jumper-straps (pre-installed) Manual Bowers & Wilkins brochure Warranty Information
What's in the Box of KEF Q150?
Here are the items that come with the Q150:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
300mm
vs
303mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
390cm2
vs
500cm2
|
Takes less floor space |
 Sensitivity |
86 dB
vs
84 dB
|
Play louder with same amount of amplification power |
 Minimum Impedance |
3.7 ohms
vs
3.0 ohms
|
Very low impedance levels puts more pressure on amplifier |
 Woofer Size |
5.25 inches
vs
5 inches
|
Larger woofer |
|
Low Frequency Response |
51 Hz
vs
52 Hz
|
Generates deeper bass |
 Price per pair* |
600USD
vs
900USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Bowers & Wilkins 607 S3 |
KEF Q150 |
| Brand |
Bowers Wilkins |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
30-100 watts |
10-100 watts |
| Sensitivity |
84 dB |
86 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
3.0 ohms |
3.7 ohms |
| Frequency Response |
52-28k Hz |
51-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5" |
5.25" |
| Woofer Composition |
Continuum |
Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Decoupled Double Dome Titanium |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
2500Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
300.0mm (11.8") |
303.0mm (11.9") |
| Width |
166.0mm (6.5") |
180.0mm (7.1") |
| Depth |
235.0mm (9.3") |
278.0mm (10.9") |
| Weight |
4.65kg (10.2lbs) |
5.60kg (12.3lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Vinyl |
MDF/Vinyl-wrapped |
| Available Colors |
Matte Black, Matte White, Oak, Red Cherry |
Black, Walnut, White |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
24-26" |
18-24" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |