In this review, we will be comparing Concord and R600, two Passive Floor-standing speakers from KLH and Polk Audio. Let's have a brief look at the main features
of KLH Concord and Polk R600 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 Polk R600 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
Both Concord and R600 are 2-way speakers.
| Driver |
KLH Concord |
Polk R600 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-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 R600 features a 1" Pinnacle Ring Radiator Tweeter and 2 x 6.5" Polypropylene Turbine Cone Woofer with a Crossover frequency at 2700Hz.
Frequency Response
Concord has a frequency range of 28-23k Hz whereas R600 has a frequency range of 43-38k Hz. With a minimum frequency of 28Hz, the Concord can go significantly deeper on the low side and provide stronger bass compared to the R600's min frequency of 43Hz.
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 and R600 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. Concord sensitivity is rated at 94 dB and the R600's is at 87.5 dB. This 6 dB difference makes the KLH Concord a more sensitive speaker compared to Polk R600, 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 R600.
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
Concord features Post type posts and R600 has a Post type posts. None of these speakers feature bi-amping/bi-wiring.
KLH Concord's 5-Way post terminals
Polk R600's Post terminals
Polk R600 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 Polk R600'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 Polk R600 has external dimensions of 1063.8 x 280.7 x 381.6mm ( 41.9 x 11 x 15inch) .
Polk R600 is clearly the larger of the two speakers. Its body is 68.7mm wider, 37.8mm taller and 1.6mm deeper than KLH Concord.
Below you can see the front view size comparison of KLH Concord and Polk R600 in scale.
Comparison image of KLH Concord and Polk R600 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 Polk R600 is approximately 1071.2cm2 / 166.0inch2. The Concord requires 25% less surface area than the R600 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 KLH Concord weighs 20.45kg / 45lbs and the Polk R600 weighs 21.50kg / 47.3lbs. This makes the R600 5% heavier than the Concord.
Here is a comparison of how Concord and R600'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 Polk R600?
Here are the items that come with the R600:
Floorstanding loudspeaker
4 Outrigger feet (pre-installed)
4 Rubber feet (pre-installed)
4 Spike feet (pre-installed)
Grille
Hex-key
Owner's Manual
Online Registration
 Sensitivity |
94 dB
vs
88 dB
|
Play louder with same amount of amplification power |
 Low Frequency Response |
28 Hz
vs
43 Hz
|
Generates deeper bass |
 Height |
1026mm
vs
1063mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
805cm2 (212x380mm)
vs
1071cm2 (280x381mm)
|
Takes less floor space |
 Price per pair* |
1000USD
vs
1698USD
|
costs less (*prices may change depending on the seller, location and time) |
 High Frequency Response |
38k Hz
vs
23k Hz
|
Generates higher frequency |
| General |
KLH Concord |
Polk Audio Reserve R600 |
| Brand |
KLH |
Polk Audio |
| Speaker Type |
Floor-standing speaker |
Floor-standing speaker |
| Power Range |
up to 225 watts |
25-200 watts |
| Sensitivity |
94 dB |
87.5 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
n/a |
4 ohms |
| Frequency Response |
28-23k Hz |
43-38k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Kevlar |
Polypropylene Turbine Cone |
| Woofer Surround Material |
Butyl Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
n/a |
Pinnacle Ring Radiator |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
2700Hz |
| Firing Direction |
n/a |
bottom |
Physical Specs |
|
|
| Height |
1026.0mm (40.4") |
1063.8mm (41.9") |
| Width |
212.0mm (8.3") |
280.7mm (11.1") |
| Depth |
380.0mm (15") |
381.6mm (15") |
| Weight |
20.45kg (45lbs) |
21.50kg (47.3lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Wood-grain vinyl |
MDF/Vinyl |
| Available Colors |
Black |
Black, Walnut, White |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
10 Years |
5 Years |
| Labor Warranty |
10 Years |
5 Years |