In this review, we will be comparing kO-R2 and AK7, two Passive Floor-standing speakers by Klipsch
Let's have a brief look at the main features
of Klipsch OJAS kO-R2 and Klipsch Klipschorn AK7 first before getting into our more
detailed comparison.
Klipsch OJAS kO-R2 Key Specs
- 2-way Design
- " Compression Horn Tweeter
- 15" Paper Woofer
- 39-20k Hz Frequency Response
- 97 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 300watts
- Weight:54.65kg
- Dimensions (H x W x D): 45-1/2" x 25-3/8" x 22-1/4" ( 1156.0 x 645.0 x 565.0mm )
Klipsch Klipschorn AK7 Key Specs
- 3-way Design
- 1" Tractrix horn Tweeter
- 3" Midrange
- 15" fiber-composite with a trihedral exponential folded horn Woofer
- 3" Midrange
- 34-19k Hz Frequency Response
- 103 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 100watts
- Weight:118.18kg
- Dimensions (H x W x D): 53" x 31-1/4" x 28-1/4" ( 1347.0 x 794.0 x 718.0mm )
kO-R2 and AK7 are members of Klipsch's Heritage series of speakers. Below you can find the loudspeakers from this series.
Klipsch Heritage Series
History
In the following sections, we will get into more detail in order to better understand how the Klipsch OJAS kO-R2 and Klipsch Klipschorn AK7 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 kO-R2 is a 2-way design whereas the AK7 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 |
Klipsch OJAS kO-R2 |
Klipsch Klipschorn AK7 |
|
Driver Setup
|
2-way
|
3-way
|
|
Tweeter
|
-inch
|
1-inch
|
|
Midrange
|
- |
1 x 3-inch |
|
Woofer
|
1 x 15-inch
|
1 x 15-inch
|
kO-R2 features a " K-706 driver Compression Horn Tweeter and 1 x 15" Paper Woofer with a Crossover frequency at 760Hz. On the other hand, the AK7 features a 1" polyimide diaphragm compression Tractrix horn Tweeter , a 3" Midrange and 1 x 15" fiber-composite with a trihedral exponential folded horn Woofer with a Crossover frequency at 380Hz - 290Hz.
Frequency Response
kO-R2 has a frequency range of 39-20k Hz whereas AK7 has a frequency range of 34-19k Hz. With a minimum frequency of 34Hz, the AK7 can go significantly deeper on the low side and provide stronger bass compared to the kO-R2's min frequency of 39Hz.
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
kO-R2 and AK7 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. kO-R2 sensitivity is rated at 97 dB and the AK7's is at 103 dB. This 6 dB difference makes the Klipsch Klipschorn AK7 a more sensitive speaker compared to Klipsch OJAS kO-R2, 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.
kO-R2 can handle a max power of 300 watts RMS from the amp the whereas AK7 has a max power handling value of 100 watts RMS, 200 watts less than the kO-R2.
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
AK7 features Binding post posts which make bi-amping or bi-wiring possible. kO-R2 has a Binding post which doesn't feature bi-amping/bi-wiring.
Klipsch Klipschorn AK7's Binding post terminals allows Bi-amping or bi-wiring
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 Klipsch OJAS kO-R2's and Klipsch Klipschorn AK7's external dimensions. Klipsch OJAS kO-R2 has external dimensions of 1156.0 x 645.0 x 565.0mm ( 45-1/2 x 25-3/8 x 22-1/4inch) whereas Klipsch Klipschorn AK7 has external dimensions of 1347.0 x 794.0 x 718.0mm ( 53 x 31-1/4 x 28-1/4inch) .
Klipsch Klipschorn AK7 is clearly the larger of the two speakers. Its body is 149mm wider, 191mm taller and 153mm deeper than Klipsch OJAS kO-R2.
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 Klipsch OJAS kO-R2 is approximately 3644.3cm2 / 564.9inch2 and base area of the Klipsch Klipschorn AK7 is approximately 5700.9cm2 / 883.6inch2. The kO-R2 requires 36% less surface area than the AK7 which gives it a small advantage on placement in tight spaces.