In this review, we will be comparing R6 Meta and Motion C10, two Passive Center Channel speakers from KEF and MartinLogan.
Let's have a brief look at the main features
of KEF R6 Meta and MartinLogan Motion C10 first before getting into our more
detailed comparison.
KEF R6 Meta Key Specs
- 3-way Design
- 12th Generation Uni-Q Driver
- 1" Hard-Dome Tweeter
- 5" Midrange
- 2 x 6.5" Hybrid Aluminum Woofer
- 65-28k Hz Frequency Response
- 88 dB Sensitivity
- Impedance: 4ohms
- Power Range:15-250watts
- Weight:17.82kg
- Dimensions (H x W x D): 202.0" x 24-5/8" x 13-5/16"( 202.0 x 626.0 x 339.0mm )
MartinLogan Motion C10 Key Specs
- 2-way Design
- 1.0 x 1.4" Folded Motion Ribbon Tweeter
- 2 x 5.5" Woven Fiberglass Woofer
- 63-25k Hz Frequency Response
- 93 dB Sensitivity
- Impedance: 4ohms
- Power Range:20-200watts
- Weight:10.70kg
- Dimensions (H x W x D): 184.0" x 19" x 11-1/2"( 184 x 483 x 293mm )
What size room are the KEF R6 Meta and MartinLogan Motion C10 speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision
factor. Here we have compared their suitability to various sizes of environments considering their size
and max power parameters:
| Listening Environment* |
KEF R6 Meta |
MartinLogan Motion C10 |
| Near-field |
Poor |
Poor |
| Small Room |
Poor |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Good |
Average |
| Very Large Room |
Average |
Poor |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2,
Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: >
400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual
listening experience changes depending on floor height, room shape, surface materials, listening
position, speaker locations, etc.)
In the following sections, we will get into more detail in order to better understand how the KEF R6 Meta and MartinLogan Motion C10 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 R6 Meta is a 3-way design whereas the Motion C10 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 |
KEF R6 Meta |
MartinLogan Motion C10 |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1.0 x 1.4-inch
|
|
Midrange
|
1 x 5-inch |
- |
|
Woofer
|
2 x 6.5-inch
|
2 x 5.5-inch
|
R6 Meta features a 1" Aluminum with MAT absorber Hard-Dome Tweeter , a 5" Midrange and 2 x 6.5" Hybrid Aluminum Woofer with a Crossover frequency at 500Hz and 2400Hz. On the other hand, the Motion C10 features a 1.0 x 1.4" Folded Motion Ribbon Tweeter and 2 x 5.5" Woven Fiberglass Woofer with a Crossover frequency at 1000Hz and 2000Hz.
Frequency Response
R6 Meta has a frequency range of 65-28k Hz whereas Motion C10 has a frequency range of 63-25k Hz. With a minimum frequency of 63Hz, the Motion C10 can go slightly deeper then the R6 Meta's min frequency of 65Hz.
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 Center Channel class in our database.
Low Frequency
Center Channel Speakers
High Frequency
Center Channel 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
R6 Meta and Motion C10 have the same Impedance of 4 ohms but where they differ is the sensitivity levels. R6 Meta sensitivity is rated at 88 dB and the Motion C10's is at 93 dB. This 5 dB difference makes the MartinLogan Motion C10 a more sensitive speaker compared to KEF R6 Meta, hence will play louder with the same amount of watts.
One thing to keep in mind that the lower impedance speakers, especially the ones that are rated at 4 ohms may put more pressure on the amplifier unit comared to higher impedance speakers especially at high volume levels, so make sure the amp you pair with the R6 Meta and the R6 Meta can provide this impedance level.
Sensitivity
Center Channel 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.
R6 Meta can handle a max power of 250 watts RMS from the amp the whereas Motion C10 has a max power handling value of 200 watts RMS, 50 watts less than the R6 Meta.
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
R6 Meta features Custom 5-way bi-wire tool-less binding posts posts which make bi-amping or bi-wiring possible. Motion C10 has a Custom 5-way binding posts which doesn't feature bi-amping/bi-wiring.
KEF R6 Meta's Custom 5-way bi-wire tool-less binding posts terminals allows Bi-amping or bi-wiring
MartinLogan Motion C10's Custom 5-way binding posts 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 KEF R6 Meta's and MartinLogan Motion C10's external dimensions. KEF R6 Meta has external dimensions of 202.0 x 626.0 x 339.0mm ( 7-15/16-inch x 24-5/8-inch x 13-5/16-inch) whereas MartinLogan Motion C10 has external dimensions of 184 x 483 x 293mm ( 7-1/4inch x 19inch x 11-1/2inch ) .
KEF R6 Meta is clearly the larger of the two speakers. Its body is 143mm wider, 18mm taller and 46mm deeper than MartinLogan Motion C10.
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 KEF R6 Meta is approximately 2122.1cm2 / 328.9inch2 and base area of the MartinLogan Motion C10 is approximately 1415.2cm2 / 219.4inch2. The R6 Meta requires 50% more surface area than the Motion C10 which gives it a small disadvantage on placement in tight spaces.