In this review, we will be comparing 5040 and Kendall, two Passive Floor-standing speakers from Q Acoustics and KLH.
Let's have a brief look at the main features
of Q Acoustics 5040 and KLH Kendall first before getting into our more
detailed comparison.
| Key Specs | Q Acoustics 5040 | KLH Kendall |
|---|
| Brand | Q Acoustics
United Kingdom · founded 2006 | KLH
United States · founded 1957 |
|---|
| Design | 2-way | 3-way |
|---|
| Tweeter | 1" Soft-dome | 1" |
|---|
| Midrange | — | 5.25" |
|---|
| Woofer | 2 x 5" Continuous Curved Cone | 2 x 6.5" Woven Kevlar |
|---|
| Frequency response | 39-30k Hz | 25-23k Hz |
|---|
| Sensitivity | 91.5 dB | 96 dB |
|---|
| Impedance | 6 ohms | 8 ohms |
|---|
| Power range | 25-150 watts | up to 250 watts |
|---|
| Weight | 18.05kg / 39.7lbs | 22.14kg / 48.7lbs |
|---|
| Dimensions (H x W x D) | 38-1/8" x 14-1/4" x 11-1/2"
969.0 x 362.0 x 293.0mm | 40-3/16" x 8-5/16" x 14-15/16"
1021.0 x 212.0 x 380.0mm |
|---|
The sections below take each area in turn: drivers, frequency response, physical size and what you get in the box.
Drivers
One of the fundamental differences between these two speakers is that 5040 is a 2-way design whereas the Kendall is a 3-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.
Q Acoustics 5040KLH Kendall
TweeterMidrangeWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Q Acoustics 5040 |
KLH Kendall |
|
Driver Setup
|
2-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
1 x 5.25-inch |
|
Woofer
|
2 x 5-inch
|
2 x 6.5-inch
|
5040 features a 1" Soft-dome Tweeter and 2 x 5" Continuous Curved Cone Woofer with a Crossover frequency at 2500 Hz. On the other hand, the Kendall features a 1" anodized aluminum Tweeter, a 5.25" Midrange and 2 x 6.5" Woven Kevlar Woofer.
Frequency Response
5040 has a frequency range of 39-30k Hz whereas Kendall has a frequency range of 25-23k Hz. With a minimum frequency of 25Hz, the Kendall can go significantly deeper on the low side and provide stronger bass compared to the 5040's min frequency of 39Hz.
The graph below depicts how these two speakers compare with the max, min and average Low Frequency values of other speakers in the Floor-standing class in our database.
Low Frequency
Floor-standing 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
5040 is a 6 ohms speaker compared to the Kendall which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. 5040 sensitivity is rated at 91.5 dB and the Kendall's is rated at 96 dB. This 4 dB difference makes the KLH Kendall a more sensitive speaker compared to Q Acoustics 5040, hence will play louder with the same amount of watts.
Sensitivity
Floor-standing 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 can handle a max power of 250 watts RMS, whereas 5040 has a max power handling value of 150 watts RMS, 100 watts less than the Kendall.
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 features Binding post posts which make bi-amping or bi-wiring possible. 5040 has a Binding post which doesn't feature bi-amping/bi-wiring.
Q Acoustics 5040's Binding post terminals
KLH Kendall's Binding post terminals allows Bi-amping or bi-wiring
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 Q Acoustics 5040's and KLH Kendall's external dimensions. Q Acoustics 5040 has external dimensions of 969.0 x 362.0 x 293.0mm (38-1/8inch x 14-1/4inch x 11-1/2inch) whereas KLH Kendall has external dimensions of 1021.0 x 212.0 x 380.0mm (40-3/16 x 8-5/16 x 14-15/16inch).
Q Acoustics 5040 is 52mm shorter and 87mm less deeper than KLH Kendall but it is also 150mm wider.
Below you can see the front view size comparison of Q Acoustics 5040 and KLH Kendall in scale.
Comparison image of Q Acoustics 5040 and KLH Kendall 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 Q Acoustics 5040 is approximately 1060.7cm2 / 164.4inch2 and base area of the KLH Kendall is approximately 805.6cm2 / 124.9inch2. The 5040 requires 32% more surface area than the Kendall 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 Q Acoustics 5040 weighs 18.05kg / 39.7lbs and the KLH Kendall weighs 22.14kg / 48.7lbs. This makes the Kendall 23% heavier than the 5040.
Here is a comparison of how 5040 and Kendall's weights compare with the average, max and min weights in Passive Floor-standing class.
Weight
All Floor-standing Speakers
What's in the Box of Q Acoustics 5040?
Here are the items that are included inside the box of 5040:
- 1x 5040 loudspeaker
- 1x Owners manual
- 2x Foam bung
- 4x Spike feet
- 4x Spike cover
- 4x M5 screw
- 2x Rear stabiliser
What's in the Box of KLH Kendall?
Here are the items that come with the Kendall:
- Floorstanding loudspeaker
- Grille
- Foam port
- 4 Rubber feet
- 4 Spike feet (with nuts)
- 4 Protective discs
- Manual
 High Frequency Response |
30k Hz
vs
23k Hz
|
Generates higher frequency |
 Height |
969mm
vs
1021mm
|
Easier to fit in smaller spaces |
 Price per pair* |
1498USD
vs
1500USD
|
costs less (*prices may change depending on the seller, location and time) |
 Max Input Power |
250 watts
vs
150 watts
|
Handle more power from your amplifier |
 Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
 Sensitivity |
96 dB
vs
92 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Woofer Size |
6.5 inches
vs
5 inches
|
Larger woofer |
|
Low Frequency Response |
25 Hz
vs
39 Hz
|
Generates deeper bass |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Base Surface Area |
805cm2
vs
1060cm2
|
Takes less floor space |
| General |
Q Acoustics 5040 |
KLH Kendall |
| Brand |
Q Acoustics |
KLH |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
25-150 watts |
up to 250 watts |
| Sensitivity |
91.5 dB |
96 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
3.0 ohms |
n/a |
| Frequency Response |
39-30k Hz |
25-23k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
5" |
6.5" |
| Woofer Composition |
Continuous Curved Cone |
Woven Kevlar |
| Woofer Surround Material |
Rubber |
Butyl Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-dome |
n/a |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
5.25" |
| Crossover Frequency |
2500 Hz |
n/a |
| Firing Direction |
rear |
n/a |
Physical Specs |
|
|
| Height |
969.0mm (38.1") |
1021.0mm (40.2") |
| Width |
362.0mm (14.3") |
212.0mm (8.3") |
| Depth |
293.0mm (11.5") |
380.0mm (15") |
| Weight |
18.05kg (39.7lbs) |
22.14kg (48.7lbs) |
| Enclosure |
Bass Relfex |
Bass Reflex |
| Finish |
MDF |
MDF/Wood Veneer |
| Available Colors |
Holme Oak,Satin Black,Satin White,Santos Rosewood |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
Yes |
Other |
|
|
| Parts Warranty |
5 years |
10 Years |
| Labor Warranty |
5 years |
10 Years |
A generation apart: Q Acoustics 5040 is the newer design, against a 2019 model. Newer is not automatically better, but the older one is more likely to be discounted or near run-out.
| Area | Better | Why |
|---|
| Bass | B | KLH Kendall digs deeper - 25Hz against 39Hz. |
| Amplifier needs | B | KLH Kendall is more sensitive (96dB vs 92dB), so it goes louder on the same amplifier. |
| Amplifier match | B | KLH Kendall is the easier load at 8 ohms. |
| Headroom | B | KLH Kendall takes more power (250W vs 150W) - more in hand in a big room. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | depends | KLH Kendall: bi-amping. Q Acoustics 5040 sits in a wider range (5 models), so a matched surround system is easier later. |
| Price | evenly matched | Much the same money ($1,498 vs $1,500 a pair). |
A Q Acoustics 5040 B KLH Kendall
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?
KLH Kendall has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 39Hz anyway, so judge these on the other rows instead. If your amplifier is modest, vintage or valve-based, KLH Kendall is the safer partner - the other will want more current or more watts to sound its best.
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.