In this review, we will be comparing Kendall 2B and Q150, two Passive Bookshelf speakers from KLH and KEF.
Let's have a brief look at the main features
of KLH Kendall 2B and KEF Q150 first before getting into our more
detailed comparison.
| Key Specs | KLH Kendall 2B | KEF Q150 |
|---|
| Brand | KLH
United States · founded 1957 | KEF
United Kingdom · founded 1961 |
|---|
| Design | 2-way | 2-way |
|---|
| Uni-Q driver | — | 11th Generation Uni-Q |
|---|
| Tweeter | 1" Hard-Dome | 1" Dome |
|---|
| Woofer | 6.5" Aluminum | 5.25" Aluminum |
|---|
| Frequency response | 55-20k Hz | 51-28k Hz |
|---|
| Sensitivity | 86 dB | 86 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | 200 watts | 10-100 watts |
|---|
| Weight | 5.91kg / 13lbs | 5.60kg / 12.3lbs |
|---|
| Dimensions (H x W x D) | 13-1/4" x 7-3/4" x 8-1/2"
337.0 x 197.0 x 216.0mm | 11.9" x 7.0" x 10.9"
303.0 x 180.0 x 278.0mm |
|---|
What size room are the KLH Kendall 2B 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* |
KLH Kendall 2B |
KEF Q150 |
| Near-field |
Poor |
Average |
| Small Room |
Average |
Good |
| Mid-size Room |
Good |
Average |
| Large Room |
Average |
Poor |
| Very Large Room |
Poor |
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.)
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
Both Kendall 2B and Q150 are 2-way speakers.
KLH Kendall 2BKEF Q150
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 Kendall 2B |
KEF Q150 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 5.25-inch
|
Kendall 2B features a 1" Hard-Dome Tweeter and 1 x 6.5" Aluminum Woofer with a Crossover frequency at 2500 HZ. 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
Kendall 2B has a frequency range of 55-20k 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 Kendall 2B's min frequency of 55Hz.
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
Kendall 2B and Q150 have the same Impedance of 8 ohms and their sensitivity is also same at 86 dB.
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.
Kendall 2B can handle a max power of 200 watts RMS, whereas Q150 has a max power handling value of 100 watts RMS, 100 watts less than the Kendall 2B.
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
Kendall 2B features 5-way post posts which make bi-amping or bi-wiring possible. Q150 has a Post which doesn't feature bi-amping/bi-wiring.
KLH Kendall 2B's 5-way post terminals allows Bi-amping or bi-wiring
KEF Q150's Post terminals
Cabinet Type and Port Position
Both Kendall 2B 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
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 Kendall 2B's and KEF Q150's external dimensions. KLH Kendall 2B has external dimensions of 337.0 x 197.0 x 216.0mm (13-1/4inch x 7-3/4inch x 8-1/2inch) 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 17mm narrower and 34mm shorter than KLH Kendall 2B but it is also 62mm deeper.
Below you can see the front view size comparison of KLH Kendall 2B and KEF Q150 in scale.
Comparison image of KLH Kendall 2B 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 KLH Kendall 2B is approximately 425.5cm2 / 66.0inch2 and base area of the KEF Q150 is approximately 500.4cm2 / 77.6inch2. The Kendall 2B requires 15% less surface area than the Q150 which gives it a small advantage on placement in tight spaces.
Here is 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 KLH Kendall 2B 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 KLH Kendall 2B weighs 5.91kg / 13lbs and the KEF Q150 weighs 5.60kg / 12.3lbs. This makes the Kendall 2B 6% heavier than the Q150.
Here is a comparison of how Kendall 2B 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 KLH Kendall 2B?
Here are the items that are included inside the box of Kendall 2B:
- 2 x 2B Loudspeaker and Grille
- Owners Manual
- Binding Post Wrench
- Rubber Adhesive Feet
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
 Max Input Power |
200 watts
vs
100 watts
|
Handle more power from your amplifier |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Base Surface Area |
425cm2
vs
500cm2
|
Takes less floor space |
|
Low Frequency Response |
51 Hz
vs
55 Hz
|
Generates deeper bass |
 High Frequency Response |
28k Hz
vs
20k Hz
|
Generates higher frequency |
 Height |
303mm
vs
337mm
|
Easier to fit in smaller spaces |
 Price per pair* |
600USD
vs
999USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
KLH Kendall 2B |
KEF Q150 |
| Brand |
KLH |
KEF |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
200 watts |
10-100 watts |
| Sensitivity |
86 dB |
86 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
3.7 ohms |
| Frequency Response |
55-20k Hz |
51-28k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
5.25" |
| Woofer Composition |
Aluminum |
Aluminum |
| Woofer Surround Material |
Butyl rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Hard-Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2500 HZ |
2500Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
337.0mm (13.3") |
303.0mm (11.9") |
| Width |
197.0mm (7.8") |
180.0mm (7.1") |
| Depth |
216.0mm (8.5") |
278.0mm (10.9") |
| Weight |
5.91kg (13lbs) |
5.60kg (12.3lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood veneer |
MDF/Vinyl-wrapped |
| Available Colors |
Black Oak,English Walnut |
Black, Walnut, White |
| Mounting Bracket |
|
No |
| Recommended Stand Height |
n/a |
18-24" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
10 years |
5 Years |
| Labor Warranty |
10 years |
5 Years |
These sit in different price classes - KLH Kendall 2B costs roughly 1.7x what KEF Q150 does. Expect it to lead on paper; the question is whether the gap is audible enough in your room to be worth it.
| Area | Better | Why |
|---|
| Bass | B | KEF Q150 digs deeper - 51Hz against 55Hz. A subwoofer would even that out. |
| Amplifier needs | evenly matched | Similar sensitivity (86dB vs 86dB) - both want much the same power. |
| Headroom | A | KLH Kendall 2B takes more power (200W vs 100W) - more in hand in a big room. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | depends | KLH Kendall 2B: bi-amping. KEF Q150 sits in a wider range (7 models), so a matched surround system is easier later. |
| Price | B | KEF Q150 is cheaper - $600 against $999, about 40% less; arguably a different class. |
A KLH Kendall 2B B KEF Q150
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. Match it to your room: we rate KLH Kendall 2B the better fit for a mid-size room and a large room, and KEF Q150 for near-field listening and a small room. Think about the whole system, not just the speakers: the roughly $399 saved by taking the cheaper pair would buy a subwoofer or a better amplifier, and either usually does more for the sound than the difference between these two.
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.