In this review, we will be comparing Lumina III and Concord, two Passive Floor-standing speakers from Sonus Faber and KLH. Let's have a brief look at the main features
of Sonus Lumina III and KLH Concord first before getting into our more
detailed comparison.
In the following sections, we will get into more detail in order to better understand how the Sonus Lumina III and KLH Concord 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
One of the fundamental differences between these two speakers is that Lumina III 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.
| Driver |
Sonus Lumina III |
KLH Concord |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1.15-inch
|
1-inch
|
|
Midrange
|
1 x 6-inch |
- |
|
Woofer
|
2 x 6-inch
|
2 x 6.5-inch
|
Lumina III features a 1.15" high definition DAD Tweeter , a 6" Midrange and 2 x 6" paper cone Woofer with a Crossover frequency at 350 and 3500 Hz. On the other hand, the Concord features a 1" anodized aluminum Tweeter and 2 x 6.5" Kevlar Woofer .
Frequency Response
Lumina III has a frequency range of 40-24k 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 Lumina III's min frequency of 40Hz.
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 Floor-standing class in our database.
Low Frequency
Floor-standing Speakers
High Frequency
Floor-standing 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
Lumina III is a 4 ohms speaker compared to the Concord which has a nominal impedance of 8 ohms. Lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit especially when played at high volume levels, so make sure the amp you pair with the Lumina III can provide this impedance level.
These two speakers also have different sensitivity levels. Lumina III sensitivity is rated at 89 dB and the Concord's is rated at 94 dB. This 5 dB difference makes the KLH Concord a more sensitive speaker compared to Sonus Lumina III, 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. 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.
Lumina III can handle a max power of 250 watts RMS from the amp the whereas Concord has a max power handling value of watts RMS, 250 watts less than the Lumina III.
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
Lumina III 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
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 Sonus Lumina III's and KLH Concord's external dimensions. Sonus Lumina III has external dimensions of 989.0 x 228.0 x 278.0mm ( 38.9 x 9 x 10.9inch) 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) .
Sonus Lumina III is 37mm shorter and 102mm less deeper than KLH Concord but it is also 16mm wider.
Below you can see the front view size comparison of Sonus Lumina III and KLH Concord in scale.
Comparison image of Sonus Lumina III 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 Sonus Lumina III is approximately 633.8cm2 / 98.2inch2 and base area of the KLH Concord is approximately 805.6cm2 / 124.9inch2. The Lumina III requires 21% 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 Sonus Lumina III weighs 15.90kg / 35lbs and the KLH Concord weighs 20.45kg / 45lbs. This makes the Concord 29% heavier than the Lumina III.
Here is a comparison of how Lumina III 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 Sonus Lumina III?
Here are the items that are included inside the box of Lumina III:
Floorstanding loudspeaker1 Manual 2 Jumpers2 Grilles 2 Fabric dust guards4 Spikes 4 Under spikes 4 Spikes locks
What's in the Box of KLH Concord?
Here are the items that come with the Concord:
Floorstanding loudspeakerGrille4 Spike feet (w/ locking nut attached)4 Protective discs4 Rubber feetPort plugManualATTENTION! note
 Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
 High Frequency Response |
24k Hz
vs
23k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
989mm
vs
1026mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
633cm2 (228x278mm)
vs
805cm2 (212x380mm)
|
Takes less floor space |
 Sensitivity |
94 dB
vs
89 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
 Woofer Size |
6.5 inches
vs
6 inches
|
Larger woofer |
| Low Frequency Response |
28 Hz
vs
40 Hz
|
Generates deeper bass |
 Price per pair* |
1000USD
vs
2199USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Sonus Faber Lumina III |
KLH Concord |
| Brand |
Sonus Faber |
KLH |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
50-250 watts |
up to 225 watts |
| Sensitivity |
89 dB |
94 dB |
| Impedance |
4 ohms |
8 ohms |
| Frequency Response |
40-24k Hz |
28-23k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6" |
6.5" |
| Woofer Composition |
paper cone |
Kevlar |
| Woofer Surround Material |
n/a |
Butyl Rubber |
| Tweeter Size |
1.15" |
1" |
| Tweeter Type |
high definition DAD |
n/a |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
6" |
No |
| Crossover Frequency |
350 and 3500 Hz |
n/a |
| Firing Direction |
bottom |
n/a |
Physical Specs |
|
|
| Height |
989.0mm (38.9") |
1026.0mm (40.4") |
| Width |
228.0mm (9") |
212.0mm (8.3") |
| Depth |
278.0mm (10.9") |
380.0mm (15") |
| Weight |
15.90kg (35lbs) |
20.45kg (45lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
real multilayer wood |
MDF/Wood-grain vinyl |
| Available Colors |
Black, Wenge, Walnut |
Black |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
|
10 Years |
| Labor Warranty |
|
10 Years |