In this review, we will be comparing Motion 6i and Uni-Fi Reference UCR52, two Passive Center Channel speakers from MartinLogan and ELAC.
Let's have a brief look at the main features
of MartinLogan 6i and ELAC Uni-Fi Ref UCR52 first before getting into our more
detailed comparison.
MartinLogan 6i Key Specs
- 2-way Design
- 1.0 x 1.0" Folded Motion Tweeter
- 2 x 3.5" poly cone woofers with rigid dust caps Woofer
- 120-23k Hz Frequency Response
- 89 dB Sensitivity
- Impedance: 6ohms
- Power Range:20-130watts
- Weight:2.59kg
- Dimensions (H x W x D): 134.0" x 17-1/2" x 4"( 134.0 x 445.0 x 102.0mm )
ELAC Uni-Fi Ref UCR52 Key Specs
- 3-way Design
- 1" soft dome Tweeter
- 4" Midrange
- 2 x 5.25" aluminum Woofer
- 4" Midrange
- 47-35k Hz Frequency Response
- 85 dB Sensitivity
- Impedance: 6ohms
- Power Range:up to 140watts
- Weight:13.20kg
- Dimensions (H x W x D): 188.0" x 20-7/8" x 13-1/16"( 188.0 x 531.0 x 332.0mm )
What size room are the MartinLogan 6i and ELAC Uni-Fi Ref UCR52 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* |
MartinLogan 6i |
ELAC Uni-Fi Ref UCR52 |
| 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 MartinLogan 6i and ELAC Uni-Fi Ref UCR52 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 Motion 6i is a 2-way design whereas the Uni-Fi Reference UCR52 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 |
MartinLogan 6i |
ELAC Uni-Fi Ref UCR52 |
|
Driver Setup
|
2-way
|
3-way
|
|
Tweeter
|
1.0 x 1.0-inch
|
1-inch
|
|
Midrange
|
- |
1 x 4-inch |
|
Woofer
|
2 x 3.5-inch
|
2 x 5.25-inch
|
Motion 6i features a 1.0 x 1.0" Folded Motion Tweeter and 2 x 3.5" poly cone woofers with rigid dust caps Woofer . On the other hand, the Uni-Fi Reference UCR52 features a 1" soft dome Tweeter , a 4" Midrange and 2 x 5.25" aluminum Woofer .
Frequency Response
Motion 6i has a frequency range of 120-23k Hz whereas Uni-Fi Reference UCR52 has a frequency range of 47-35k Hz. With a minimum frequency of 47Hz, the Uni-Fi Reference UCR52 can go significantly deeper on the low side and provide stronger bass compared to the Motion 6i's min frequency of 120Hz.
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
Motion 6i and Uni-Fi Reference UCR52 have the same Impedance of 6 ohms but where they differ is the sensitivity levels. Motion 6i sensitivity is rated at 89 dB and the Uni-Fi Reference UCR52's is at 85 dB. This 4 dB difference makes the MartinLogan 6i a more sensitive speaker compared to ELAC Uni-Fi Ref UCR52, 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.
Motion 6i can handle a max power of 140 watts RMS from the amp the whereas Motion 6i has a max power handling value of 130 watts RMS , 10 watts less than the Uni-Fi Reference UCR52.
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
Motion 6i features Binding post type posts and Uni-Fi Reference UCR52 has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
MartinLogan 6i's Spring post terminals
ELAC Uni-Fi Ref UCR52's Binding post 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 MartinLogan 6i's and ELAC Uni-Fi Ref UCR52's external dimensions. MartinLogan 6i has external dimensions of 134.0 x 445.0 x 102.0mm ( 5-1/4 x 17-1/2 x 4inch) whereas ELAC Uni-Fi Ref UCR52 has external dimensions of 188.0 x 531.0 x 332.0mm ( 7-3/8 x 20-7/8 x 13-1/16inch) .
ELAC Uni-Fi Ref UCR52 is clearly the larger of the two speakers. Its body is 86mm wider, 54mm taller and 230mm deeper than MartinLogan 6i.
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 MartinLogan 6i is approximately 453.9cm2 / 70.4inch2 and base area of the ELAC Uni-Fi Ref UCR52 is approximately 1762.9cm2 / 273.2inch2. The Motion 6i requires 74% less surface area than the Uni-Fi Reference UCR52 which gives it a small advantage on placement in tight spaces.