In this review, we will be comparing 3050c and Concord, two Passive Floor-standing speakers from Q Acoustics and KLH.
Let's have a brief look at the main features
of Q Acoustics 3050c and KLH Concord first before getting into our more
detailed comparison.
| Key Specs | Q Acoustics 3050c | KLH Concord |
|---|
| Brand | Q Acoustics
United Kingdom · founded 2006 | KLH
United States · founded 1957 |
|---|
| Design | 2-way | 2-way |
|---|
| Tweeter | 0.9" decoupled | 1" |
|---|
| Woofer | 2 x 5.5" Coated paper | 2 x 6.5" Kevlar |
|---|
| Frequency response | 42-30k Hz | 28-23k Hz |
|---|
| Sensitivity | 90 dB | 94 dB |
|---|
| Impedance | 6 ohms | 8 ohms |
|---|
| Power range | 25-150 watts | up to 225 watts |
|---|
| Weight | 17.91kg / 39.4lbs | 20.45kg / 45lbs |
|---|
| Dimensions (H x W x D) | 40.2" x 12.4" x 12.4"
1020 x 315 x 316 mm | 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.
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Drivers
Both 3050c and Concord are 2-way speakers.
Q Acoustics 3050cKLH Concord
TweeterWoofer
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 3050c |
KLH Concord |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
0.9-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 5.5-inch
|
2 x 6.5-inch
|
3050c features a 0.9" decoupled Tweeter and 2 x 5.5" Coated paper Woofer with a Crossover frequency at 2400 Hz. On the other hand, the Concord features a 1" anodized aluminum Tweeter and 2 x 6.5" Kevlar Woofer.
Frequency Response
3050c has a frequency range of 42-30k 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 3050c's min frequency of 42Hz.
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
3050c is a 6 ohms speaker compared to the Concord which has a nominal impedance of 8 ohms.
These two speakers also have different sensitivity levels. 3050c sensitivity is rated at 90 dB and the Concord's is rated at 94 dB. This 4 dB difference makes the KLH Concord a more sensitive speaker compared to Q Acoustics 3050c, 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 3050c has a max power handling value of 150 watts RMS, 75 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
3050c features 5-Way post type posts and Concord has a 5-Way post type posts. None of these speakers 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 Q Acoustics 3050c's and KLH Concord's external dimensions. Q Acoustics 3050c has external dimensions of 1020 x 315 x 316 mm (40.2 x 12.4 x 12.4 in) 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).
Q Acoustics 3050c is 6mm shorter and 64mm less deeper than KLH Concord but it is also 103mm wider.
Below you can see the front view size comparison of Q Acoustics 3050c and KLH Concord in scale.
Comparison image of Q Acoustics 3050c and KLH Concord 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 3050c is approximately 995.4cm2 / 154.3inch2 and base area of the KLH Concord is approximately 805.6cm2 / 124.9inch2. The 3050c requires 24% more surface area than the Concord 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 3050c weighs 17.91kg / 39.4lbs and the KLH Concord weighs 20.45kg / 45lbs. This makes the Concord 14% heavier than the 3050c.
Here is a comparison of how 3050c 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 Q Acoustics 3050c?
Here are the items that are included inside the box of 3050c:
- 1x 3050c 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 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
 High Frequency Response |
30k Hz
vs
23k Hz
|
Generates higher frequency |
 Height |
1020mm
vs
1026mm
|
Easier to fit in smaller spaces |
 Max Input Power |
225 watts
vs
150 watts
|
Handle more power from your amplifier |
 Sensitivity |
94 dB
vs
90 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
5.5 inches
|
Larger woofer |
|
Low Frequency Response |
28 Hz
vs
42 Hz
|
Generates deeper bass |
 Base Surface Area |
805cm2
vs
995cm2
|
Takes less floor space |
 Price per pair* |
1000USD
vs
1199USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Q Acoustics 3050c |
KLH Concord |
| Brand |
Q Acoustics |
KLH |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
25-150 watts |
up to 225 watts |
| Sensitivity |
90 dB |
94 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
3.8 ohms |
n/a |
| Frequency Response |
42-30k Hz |
28-23k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
5.5" |
6.5" |
| Woofer Composition |
Coated paper |
Kevlar |
| Woofer Surround Material |
Rubber |
Butyl Rubber |
| Tweeter Size |
0.9" |
1" |
| Tweeter Type |
decoupled |
n/a |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2400 Hz |
n/a |
| Firing Direction |
rear |
n/a |
Physical Specs |
|
|
| Height |
1020.0mm (40.2") |
1026.0mm (40.4") |
| Width |
315.0mm (12.4") |
212.0mm (8.3") |
| Depth |
316.0mm (12.4") |
380.0mm (15") |
| Weight |
17.91kg (39.4lbs) |
20.45kg (45lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF |
MDF/Wood-grain vinyl |
| Available Colors |
Walnut, Black, White, Oak |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
4 Years |
10 Years |
| Labor Warranty |
4 Years |
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 42Hz. |
| Amplifier needs | B | KLH Concord is more sensitive (94dB vs 90dB), so it goes louder on the same amplifier. |
| Amplifier match | B | KLH Concord is the easier load at 8 ohms. |
| Headroom | B | KLH Concord takes more power (225W vs 150W) - more in hand in a big room. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Price | B | KLH Concord is cheaper - $1,000 against $1,199, about 17% less. |
A Q Acoustics 3050c 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?
KLH Concord is the easier recommendation: it leads on most of the measured areas and costs less. Take Q Acoustics 3050c if its size, looks or fit in your room suit you better. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 42Hz anyway, so judge these on the other rows instead. 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.