In this review, we will be comparing Airmotiv C3+ and R2c, two Passive Center Channel speakers from Emotiva and KEF.
Let's have a brief look at the main features
of Emotiva Airmotiv C3+ and KEF R2c first before getting into our more
detailed comparison.
Emotiva Airmotiv C3+ Key Specs
- 3-way Design
- 25×32 mm" folded ribbon Tweeter
- 5.25" Midrange
- 4 x 6.5" woven fiber cone Woofer
- 40 Hz – 28 kHz Frequency Response
- 92 dB Sensitivity
- Impedance: 4ohms
- Power Range:Up to 200watts
- Weight:26.80kg
- Dimensions (H x W x D): 220.0" x 54-3/4" x 12-1/4"( 220.0 x 1391.0 x 312.0mm )
KEF R2c Key Specs
- 3-way Design
- 1" Dome Tweeter
- 5" Midrange
- 2 x 5.25" Hybrid Aluminum Woofer
- 5" Midrange
- 74-28k Hz Frequency Response
- 87 dB Sensitivity
- Impedance: 8ohms
- Power Range:15-200watts
- Weight:16.90kg
- Dimensions (H x W x D): 177.0" x 21-11/16" x 12-7/16"( 177.0 x 551.0 x 316.0mm )
What size room are the Emotiva Airmotiv C3+ and KEF R2c 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* |
Emotiva Airmotiv C3+ |
KEF R2c |
| Near-field |
Poor |
Poor |
| Small Room |
Average |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Average |
Average |
| Very Large Room |
Poor |
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 Emotiva Airmotiv C3+ and KEF R2c 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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through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both Airmotiv C3+ and R2c are 3-way speakers.
| Driver |
Emotiva Airmotiv C3+ |
KEF R2c |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
25×32 mm-inch
|
1-inch
|
|
Midrange
|
2 x 5.25-inch |
1 x 5-inch |
|
Woofer
|
4 x 6.5-inch
|
2 x 5.25-inch
|
Airmotiv C3+ features a 25×32 mm" folded ribbon Tweeter , a 5.25" Midrange and 4 x 6.5" woven fiber cone Woofer with a Crossover frequency at 350 Hz and 2800Hz. On the other hand, the R2c features a 1" aluminum Dome Tweeter , a 5" Midrange and 2 x 5.25" Hybrid Aluminum Woofer with a Crossover frequency at 400Hz and 2900Hz.
Frequency Response
Airmotiv C3+ has a frequency range of 40 Hz – 28 kHz whereas R2c has a frequency range of 74-28k Hz. With a minimum frequency of 40Hz, the Airmotiv C3+ can go significantly deeper on the low side and provide stronger bass compared to the R2c's min frequency of 74Hz.
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
Airmotiv C3+ is a 4 ohms speaker compared to the R2c which has a nominal impedance of 8 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 Airmotiv C3+ can provide this impedance level.
These two speakers also have different sensitivity levels. Airmotiv C3+ sensitivity is rated at 92 dB and the R2c's is rated at 87 dB. This 5 dB difference makes the Emotiva Airmotiv C3+ a more sensitive speaker compared to KEF R2c, hence will play louder with the same amount of watts.
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.
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
Both Airmotiv C3+ and R2c features dual binding post speaker terminals for bi-amping or bi-wiring.
Emotiva Airmotiv C3+'s Binding post terminals allows Bi-amping or bi-wiring
KEF R2c's Binding post terminals allows Bi-amping or bi-wiring
Cabinet Type and Port Position
Both Airmotiv C3+ and R2c have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
Emotiva Airmotiv C3+ double 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 Emotiva Airmotiv C3+'s and KEF R2c's external dimensions. Emotiva Airmotiv C3+ has external dimensions of 220.0 x 1391.0 x 312.0mm ( 8-5/8-inch x 54-3/4-inch x 12-1/4-inch) whereas KEF R2c has external dimensions of 177.0 x 551.0 x 316.0mm ( 6-15/16 x 21-11/16 x 12-7/16inch) .
KEF R2c is 840mm narrower and 43mm shorter than Emotiva Airmotiv C3+ but it is also 4mm deeper.
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 Emotiva Airmotiv C3+ is approximately 4339.9cm2 / 672.7inch2 and base area of the KEF R2c is approximately 1741.2cm2 / 269.9inch2. The Airmotiv C3+ requires 149% more surface area than the R2c which gives it a small disadvantage on placement in tight spaces.