In this review, we will be comparing LS50 and BW 606, two Passive Bookshelf speakers from KEF and Bowers Wilkins. Let's have a brief look at the main features
of KEF LS50 and B&W 606 first before getting into our more
detailed comparison.
What size room are the KEF LS50 and B&W 606 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:
In the following sections, we will get into more detail in order to better understand how the KEF LS50 and B&W 606 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
Both LS50 and BW 606 are 2-way speakers. LS50 features a 1" Aluminum Vented dome Tweeter and 1 x 5.25" Magnesium/aluminum alloy Woofer with a Crossover frequency at 2200Hz. On the other hand, the BW 606 features a 1" Decoupled Carbon Hard-Dome Tweeter and 1 x 6.5" Continuum Woofer .
Frequency Response
LS50 has a frequency range of 79-28k Hz whereas BW 606 has a frequency range of 52-28k Hz. With a minimum frequency of 52Hz, the BW 606 can go significantly deeper on the low side and provide stronger bass compared to the LS50's min frequency of 79Hz.
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
LS50 and BW 606 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. LS50 sensitivity is rated at 85 dB and the BW 606's is at 88 dB. This 3 dB difference makes the B&W 606 a more sensitive speaker compared to KEF LS50, 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.
LS50 can handle a max power of 120 watts RMS from the amp the whereas LS50 has a max power handling value of 100 watts RMS , 20 watts less than the BW 606.
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
BW 606 features Post posts which make bi-amping or bi-wiring possible. LS50 has a Post which doesn't feature bi-amping/bi-wiring.
KEF LS50's Post terminals
B&W 606's Post terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Both LS50 and BW 606 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.
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 KEF LS50's and B&W 606's external dimensions. KEF LS50 has external dimensions of 302.0 x 200.0 x 278.0mm ( 11.8 x 7.8 x 10.9inch) whereas B&W 606 has external dimensions of 345.0 x 190.0 x 324.0mm ( 13.5 x 7.4 x 12.7inch) .
KEF LS50 is 43mm shorter and 46mm less deeper than B&W 606 but it is also 10mm wider.
Below you can see the front view size comparison of KEF LS50 and B&W 606 in scale.
Comparison image of KEF LS50 and B&W 606 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 KEF LS50 is approximately 556.0cm2 / 86.2inch2 and base area of the B&W 606 is approximately 615.6cm2 / 95.4inch2. The LS50 requires 10% less surface area than the BW 606 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 KEF LS50 and B&W 606 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 KEF LS50 weighs 7.20kg / 15.8lbs and the B&W 606 weighs 6.90kg / 15.2lbs. This makes the LS50 4% heavier than the BW 606.
Here is a comparison of how LS50 and BW 606's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of KEF LS50?
Here are the items that are included inside the box of LS50:
2 Bookshelf loudspeakers 2 Foam port plugs 8 Self-adhesive rubber feet Owner's Manual Warranty Registration Card
What's in the Box of B&W 606?
Here are the items that come with the BW 606:
2 Bookshelf loudspeakers2 Grilles2 Two-piece foam port plugs8 Self-adhesive rubber feet4 Jumper-straps (pre-installed)ManualBowers & Wilkins brochureWarranty Information
 Height |
302mm
vs
345mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
556cm2 (200x278mm)
vs
615cm2 (190x324mm)
|
Takes less floor space |
 Max Input Power |
120 watts
vs
100 watts
|
Handle more power from your amplifier |
 Sensitivity |
88 dB
vs
85 dB
|
Play louder with same amount of amplification power |
 Minimum Impedance |
3.7 ohms
vs
3.2 ohms
|
Very low impedance levels puts more pressure on amplifier |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
52 Hz
vs
79 Hz
|
Generates deeper bass |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
| General |
KEF LS50 |
Bowers & Wilkins 606 |
| Brand |
KEF |
Bowers Wilkins |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
25-100 watts |
30-120 watts |
| Sensitivity |
85 dB |
88 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
3.2 ohms |
3.7 ohms |
| Frequency Response |
79-28k Hz |
52-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
5.25" |
6.5" |
| Woofer Composition |
Magnesium/aluminum alloy |
Continuum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Vented dome |
Hard-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2200Hz |
n/a |
| Firing Direction |
rear |
rear |
| Suggested Break-in Period |
n/a |
allow up to a week for the temperature effects to stabilise and 15 hours of average use for the parts to attain their intended design characteristics. |
Physical Specs |
|
|
| Height |
302.0mm (11.9") |
345.0mm (13.6") |
| Width |
200.0mm (7.9") |
190.0mm (7.5") |
| Depth |
278.0mm (10.9") |
324.0mm (12.8") |
| Weight |
7.20kg (15.8lbs) |
6.90kg (15.2lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
Polymer/Lacquer |
MDF/Vinyl |
| Available Colors |
Black, High Gloss Piano Black, High Gloss Piano White |
Black, White, Oak |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
18-28" |
24-26" |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |