In this review, we will be comparing Concord and Opticon 6 MK2, two Passive Floor-standing speakers from KLH and DALI. Let's have a brief look at the main features
of KLH Concord and DALI Opticon 6 II 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 KLH Concord and DALI Opticon 6 II compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking
through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
One of the fundamental differences between these two speakers is that Concord is a 2-way design whereas the Opticon 6 MK2 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.
| Driver |
KLH Concord |
DALI Opticon 6 II |
|
Driver Setup
|
2-way
|
3-way
|
|
Tweeter
|
1-inch
|
17 x 45 mm ribbon + 1.125-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
2 x 6.5-inch
|
2 x 6.5-inch
|
Concord features a 1" anodized aluminum Tweeter and 2 x 6.5" Kevlar Woofer . On the other hand, the Opticon 6 MK2 features a 17 x 45 mm ribbon + 1.125" Soft-dome + ribbon Hybrid Tweeter and 2 x 6.5" Wood Fiber Woofer with a Crossover frequency at 800Hz, 2200Hz and 14,000Hz.
Frequency Response
Concord has a frequency range of 28-23k Hz whereas Opticon 6 MK2 has a frequency range of 49-30k Hz. With a minimum frequency of 28Hz, the Concord can go significantly deeper on the low side and provide stronger bass compared to the Opticon 6 MK2's min frequency of 49Hz.
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
Concord is a 8 ohms speaker compared to the Opticon 6 MK2 which has a nominal impedance of 4 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 Opticon 6 MK2 can provide this impedance level.
These two speakers also have different sensitivity levels. Concord sensitivity is rated at 94 dB and the Opticon 6 MK2's is rated at 88 dB. This 6 dB difference makes the KLH Concord a more sensitive speaker compared to DALI Opticon 6 II, 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.
Concord can handle a max power of 200 watts RMS from the amp the whereas Concord has a max power handling value of watts RMS , 200 watts less than the Opticon 6 MK2.
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
Opticon 6 MK2 features 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
DALI Opticon 6 II's Post terminals allows Bi-amping or bi-wiring
DALI Opticon 6 II Port
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 KLH Concord's and DALI Opticon 6 II's external dimensions. 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) whereas DALI Opticon 6 II has external dimensions of 1010.0 x 195.0 x 340.0mm ( 39-3/4 x 7-5/8 x 13-3/8inch) .
KLH Concord is clearly the larger of the two speakers. Its body is 17mm wider, 16mm taller and 40mm deeper than DALI Opticon 6 II.
Below you can see the front view size comparison of KLH Concord and DALI Opticon 6 II in scale.
Comparison image of KLH Concord and DALI Opticon 6 II 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 Concord is approximately 805.6cm2 / 124.9inch2 and base area of the DALI Opticon 6 II is approximately 663.0cm2 / 102.8inch2. The Concord requires 22% more surface area than the Opticon 6 MK2 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 KLH Concord weighs 20.45kg / 45lbs and the DALI Opticon 6 II weighs 19.30kg / 42.5lbs. This makes the Concord 6% heavier than the Opticon 6 MK2.
Here is a comparison of how Concord and Opticon 6 MK2'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 are included inside the box of Concord:
Floorstanding loudspeakerGrille4 Spike feet (w/ locking nut attached)4 Protective discs4 Rubber feetPort plugManualATTENTION! note
What's in the Box of DALI Opticon 6 II?
Here are the items that come with the Opticon 6 MK2:
Floorstanding loudspeakerGrille2 Binding post jumpers (pre-installed)4 Outrigger feet4 Spikes (with lock nuts)4 Rubber pads4 ScrewsHex-keyWrenchQuick Start GuideCongratulations Card
 Sensitivity |
94 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Nominal Impedance |
8 ohms
vs
4 ohms
|
Less selective with amplifiers |
 Low Frequency Response |
28 Hz
vs
49 Hz
|
Generates deeper bass |
 Price per pair* |
1000USD
vs
2500USD
|
costs less (*prices may change depending on the seller, location and time) |
 Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
 High Frequency Response |
30k Hz
vs
23k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
1010mm
vs
1026mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
663cm2 (195x340mm)
vs
805cm2 (212x380mm)
|
Takes less floor space |
| General |
KLH Concord |
DALI Opticon 6 MK2 |
| Brand |
KLH |
DALI |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
up to 225 watts |
25-200 watts |
| Sensitivity |
94 dB |
88 dB |
| Impedance |
8 ohms |
4 ohms |
| Frequency Response |
28-23k Hz |
49-30k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Kevlar |
Wood Fiber |
| Woofer Surround Material |
Butyl Rubber |
Rubber |
| Tweeter Size |
1" |
17 x 45 mm ribbon + 1.125" |
| Tweeter Type |
n/a |
Soft-dome + ribbon Hybrid |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
800Hz, 2200Hz and 14,000Hz |
| Firing Direction |
n/a |
rear |
Physical Specs |
|
|
| Height |
1026.0mm (40.4") |
1010.0mm (39.8") |
| Width |
212.0mm (8.3") |
195.0mm (7.7") |
| Depth |
380.0mm (15") |
340.0mm (13.4") |
| Weight |
20.45kg (45lbs) |
19.30kg (42.5lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
MDF/Wood-grain vinyl |
| Available Colors |
Black |
Satin Black, Tobacco Oak, Satin White |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
Yes |
Other |
|
|
| Parts Warranty |
10 Years |
5 Years |
| Labor Warranty |
10 Years |
5 Years |