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KLH Concord vs Polk R600 Comparison

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KLH Concord

Passive Floor-standing | 28-23k Hz

KLH Concord
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Polk R600

Passive Floor-standing | 43-38k Hz

Polk Audio Reserve R600
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KLH Concord KLH Concord
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Polk R600 Polk R600
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KLH Concord
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Polk R600
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KLH Concord vs Polk R600 Speaker Comparison

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.

KLH Concord Key Specs

  • 2-way Design
  • 1" Tweeter
  • 2 x 6.5" Kevlar Woofer
  • 28-23k Hz Frequency Response
  • 94 dB Sensitivity
  • Impedance: 8ohms
  • Power Range:up to 225watts
  • Weight:20.45kg
  • Dimensions (H x W x D): 1026.0" x 8-5/16" x 14-15/16"( 1026.0 x 212.0 x 380.0mm )

Polk R600 Key Specs

  • 2-way Design
  • 1" Pinnacle Ring Radiator Tweeter
  • 2 x 6.5" Polypropylene Turbine Cone Woofer
  • 43-38k Hz Frequency Response
  • 87.5 dB Sensitivity
  • Impedance: 8ohms
  • Power Range:25-200watts
  • Weight:21.50kg
  • Dimensions (H x W x D): 1063.8" x 11" x 15"( 1063.8 x 280.7 x 381.6mm )

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.


**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

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

Concord
R600
Min
Average
Max
High Frequency

Floor-standing Speakers

KLH Concord
Polk R600
Min
Average
Max

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

Concord
R600
Min
Average
Max

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 Terminals
KLH Concord's 5-Way post terminals

Polk R600Post Terminals
Polk R600's Post terminals

Polk R600  Port
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.

KLH Concord vs Polk R600 Size Comparison - Front View
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
KLH Concord
Polk R600
Min
Average
Max

What's in the Box of KLH Concord?

Here are the items that are included inside the box of Concord:
  • Floorstanding loudspeaker
  • Grille
  • 4 Spike feet (w/ locking nut attached)
  • 4 Protective discs
  • 4 Rubber feet
  • Port plug
  • Manual
  • ATTENTION! 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

  • Reasons to choose KLH Concord over Polk Audio Reserve R600
    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 vs 1071cm2 Takes less floor space
    Price per pair* 1000USD vs 1698USD costs less (*prices may change depending on the seller, location and time)

    Reasons to choose Polk Audio Reserve R600 over KLH Concord

    High Frequency Response 38k Hz vs 23k Hz Generates higher frequency
    KLH Concord vs Polk R600 Specs Table
    Detailed comparison of specifications
    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

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