In this review, we will be comparing LX-6 MKII and Concord, two Passive Floor-standing speakers from Mission and KLH.
Let's have a brief look at the main features
of Mission LX-6 MKII and KLH Concord first before getting into our more
detailed comparison.
| Key Specs | Mission LX-6 MKII | KLH Concord |
|---|
| Brand | Mission
United Kingdom · founded 1977 | KLH
United States · founded 1957 |
|---|
| Design | 3-way | 2-way |
|---|
| Tweeter | 1" Soft-Dome | 1" |
|---|
| Midrange | 5" | — |
|---|
| Woofer | 2 x 6.5" Composite fibre | 2 x 6.5" Kevlar |
|---|
| Frequency response | 35-20k Hz | 28-23k Hz |
|---|
| Sensitivity | 91 dB | 94 dB |
|---|
| Impedance | 8 ohms | 8 ohms |
|---|
| Power range | 30-200 watts | up to 225 watts |
|---|
| Weight | 21.90kg / 48.2lbs | 20.45kg / 45lbs |
|---|
| Dimensions (H x W x D) | 40-3/16" x 8-7/8" x 13-1/8"
1020.0 x 226.0 x 333.0mm | 40-3/8" x 8-5/16" x 14-15/16"
1026.0 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 LX-6 MKII is a 3-way design whereas the Concord is a 2-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.
Mission LX-6 MKIIKLH Concord
TweeterMidrangeWoofer
Front view, drawn to scale - cabinets and drivers share one scale, so sizes are directly comparable. Hover a driver for its size.
| Driver |
Mission LX-6 MKII |
KLH Concord |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 5-inch |
- |
|
Woofer
|
2 x 6.5-inch
|
2 x 6.5-inch
|
LX-6 MKII features a 1" Microfibre Soft-Dome Tweeter, a 5" Midrange and 2 x 6.5" Composite fibre Woofer with a Crossover frequency at 400Hz,3.3kHz. On the other hand, the Concord features a 1" anodized aluminum Tweeter and 2 x 6.5" Kevlar Woofer.
Frequency Response
LX-6 MKII has a frequency range of 35-20k Hz whereas Concord has a frequency range of 28-23k Hz. With a minimum frequency of 28Hz, the Concord can go significantly deeper on the low side and provide stronger bass compared to the LX-6 MKII's min frequency of 35Hz.
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
LX-6 MKII and Concord have the same Impedance of 8 ohms but where they differ is the sensitivity levels. LX-6 MKII sensitivity is rated at 91 dB and the Concord's is at 94 dB. This 3 dB difference makes the KLH Concord a more sensitive speaker compared to Mission LX-6 MKII, 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.
Concord can handle a max power of 225 watts RMS, whereas LX-6 MKII has a max power handling value of 200 watts RMS, 25 watts less than the Concord.
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
LX-6 MKII features Binding post posts which make bi-amping or bi-wiring possible. Concord has a 5-Way post which doesn't feature bi-amping/bi-wiring.
KLH Concord's 5-Way 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 Mission LX-6 MKII's and KLH Concord's external dimensions. Mission LX-6 MKII has external dimensions of 1020.0 x 226.0 x 333.0mm (40-3/16 x 8-7/8 x 13-1/8inch) whereas KLH Concord has external dimensions of 1026.0 x 212.0 x 380.0mm (40-3/8 x 8-5/16 x 14-15/16inch).
Mission LX-6 MKII is 6mm shorter and 47mm less deeper than KLH Concord but it is also 14mm wider.
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.
Near-identical footprints. KLH Concord is 47mm deeper, so it stands that much further out from the wall.
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 Mission LX-6 MKII is approximately 752.6cm2 / 116.7inch2 and base area of the KLH Concord is approximately 805.6cm2 / 124.9inch2. The LX-6 MKII requires 7% less surface area than the Concord which gives it a small advantage 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 Mission LX-6 MKII weighs 21.90kg / 48.2lbs and the KLH Concord weighs 20.45kg / 45lbs. This makes the LX-6 MKII 7% heavier than the Concord.
Here is a comparison of how LX-6 MKII and Concord'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 KLH Concord?
Here are the items that come with the Concord:
- Floorstanding loudspeaker
- Grille
- 4 Spike feet (w/ locking nut attached)
- 4 Protective discs
- 4 Rubber feet
- Port plug
- Manual
- ATTENTION! note
 Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
1020mm
vs
1026mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
752cm2
vs
805cm2
|
Takes less floor space |
 Price per pair* |
799USD
vs
1000USD
|
costs less (*prices may change depending on the seller, location and time) |
 Max Input Power |
225 watts
vs
200 watts
|
Handle more power from your amplifier |
 Sensitivity |
94 dB
vs
91 dB
|
Play louder with same amount of amplification power |
 Low Frequency Response |
28 Hz
vs
35 Hz
|
Generates deeper bass |
 High Frequency Response |
23k Hz
vs
20k Hz
|
Generates higher frequency |
| General |
Mission LX-6 MKII |
KLH Concord |
| Brand |
Mission |
KLH |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
30-200 watts |
up to 225 watts |
| Sensitivity |
91 dB |
94 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
3 ohms |
n/a |
| Frequency Response |
35-20k Hz |
28-23k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Composite fibre |
Kevlar |
| Woofer Surround Material |
n/a |
Butyl Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-Dome |
n/a |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
5" |
No |
| Crossover Frequency |
400Hz,3.3kHz |
n/a |
Physical Specs |
|
|
| Height |
1020.0mm (40.2") |
1026.0mm (40.4") |
| Width |
226.0mm (8.9") |
212.0mm (8.3") |
| Depth |
333.0mm (13.1") |
380.0mm (15") |
| Weight |
21.90kg (48.2lbs) |
20.45kg (45lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
n/a |
MDF/Wood-grain vinyl |
| Available Colors |
n/a |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
|
10 Years |
| Labor Warranty |
|
10 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 | B | KLH Concord digs deeper - 28Hz against 35Hz. A subwoofer would even that out. |
| Amplifier needs | B | KLH Concord is more sensitive (94dB vs 91dB), so it goes louder on the same amplifier. |
| Headroom | evenly matched | Similar power handling (200W vs 225W). |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | A | Mission LX-6 MKII: bi-amping. |
| Price | A | Mission LX-6 MKII is cheaper - $799 against $1,000, about 20% less. |
A Mission LX-6 MKII B KLH Concord
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?
The usual trade-off: KLH Concord measures better, Mission LX-6 MKII costs about about 25% more% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 35Hz anyway, which makes the cheaper Mission LX-6 MKII much easier to justify. If your amplifier is modest, vintage or valve-based, KLH Concord 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.