In this review, we will be comparing Ultra Evolution Center and R2c, two Passive Center Channel speakers from SVS and KEF. Let's have a brief look at the main features
of SVS Ultra Evolution Center and KEF R2c first before getting into our more
detailed comparison.
What size room are the SVS Ultra Evolution Center 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:
In the following sections, we will get into more detail in order to better understand how the SVS Ultra Evolution Center and KEF R2c 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 Ultra Evolution Center and R2c are 3-way speakers.
| Driver |
SVS Ultra Evolution Center |
KEF R2c |
|
Driver Setup
|
3-way
|
3-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 4.5-inch |
1 x 5-inch |
|
Woofer
|
2 x 6.5-inch
|
2 x 5.25-inch
|
Ultra Evolution Center features a 1" aluminum Dome Tweeter , a 4.5" Midrange and 2 x 6.5" Composite glass-fiber Woofer with a Crossover frequency at 450HZ and 2200Hz. 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
Ultra Evolution Center has a frequency range of 40-40k Hz whereas R2c has a frequency range of 74-28k Hz. With a minimum frequency of 40Hz, the Ultra Evolution Center 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
SVS Ultra Evolution Center
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
Ultra Evolution Center is a 6 ohms speaker compared to the R2c which has a nominal impedance of 8 ohms.
On the other hand, they have the same sensitivity of 87 dBdB.
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.
Ultra Evolution Center can handle a max power of 225 watts RMS from the amp the whereas R2c has a max power handling value of 200 watts RMS, 25 watts less than the Ultra Evolution Center.
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 Ultra Evolution Center and R2c features dual binding post speaker terminals for bi-amping or bi-wiring.
SVS Ultra Evolution Center's Gold-plated 5-way 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 Ultra Evolution Center 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.
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 SVS Ultra Evolution Center's and KEF R2c's external dimensions. SVS Ultra Evolution Center has external dimensions of 199 x 560 x 299.2mm ( 7.83 x 22.05 x 11.78”) 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 9mm narrower and 22mm shorter than SVS Ultra Evolution Center but it is also 17mm 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 SVS Ultra Evolution Center is approximately 1674.4cm2 / 259.5inch2 and base area of the KEF R2c is approximately 1741.2cm2 / 269.9inch2. The Ultra Evolution Center requires 4% less surface area than the R2c 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 SVS Ultra Evolution Center weighs 12.20kg / 26.8lbs and the KEF R2c weighs 16.90kg / 37.2lbs. This makes the R2c 39% heavier than the Ultra Evolution Center.
Here is a comparison of how Ultra Evolution Center and R2c's weights compare with the average, max and min weights in Passive Center Channel class.
Weight
All Center Channel Speakers
SVS Ultra Evolution Center
What's in the Box of KEF R2c?
Here are the items that come with the R2c:
Center-channel loudspeakerGrille4 Self-adhesive rubber feetUser ManualWarranty Information
 Max Input Power |
225 watts
vs
200 watts
|
Handle more power from your amplifier |
 Woofer Size |
6.5 inches
vs
5.25 inches
|
Larger woofer |
| Low Frequency Response |
40 Hz
vs
74 Hz
|
Generates deeper bass |
 High Frequency Response |
40k Hz
vs
28k Hz
|
Generates higher frequency |
 Base Surface Area |
1674cm2 (560x299mm)
vs
1741cm2 (551x316mm)
|
Takes less floor space |
 Price per pair* |
799USD
vs
1300USD
|
costs less (*prices may change depending on the seller, location and time) |
 Nominal Impedance |
8 ohms
vs
6 ohms
|
Less selective with amplifiers |
 Height |
177mm
vs
199mm
|
Easier to fit in smaller spaces |
| General |
SVS Ultra Evolution Center |
KEF R2c |
| Brand |
SVS |
KEF |
| Speaker Type |
Center channel speaker |
Center channel speaker |
| Power Range |
20-225 watts |
15-200 watts |
| Sensitivity |
87 dB |
87 dB |
| Impedance |
6 ohms |
8 ohms |
| Impedance |
n/a |
3.2 ohms |
| Frequency Response |
40-40k Hz |
74-28k Hz |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6.5" |
5.25" |
| Woofer Composition |
Composite glass-fiber |
Hybrid Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Dome |
Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
4.5" |
5" |
| Crossover Frequency |
450HZ and 2200Hz |
400Hz and 2900Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
199.0mm (7.8") |
177.0mm (7") |
| Width |
560.0mm (22") |
551.0mm (21.7") |
| Depth |
299.0mm (11.8") |
316.0mm (12.4") |
| Weight |
12.20kg (26.8lbs) |
16.90kg (37.2lbs) |
| Enclosure |
Bass Reflex |
Acoustic Suspension |
| Available Colors |
Piano Gloss Black,Piano Gloss White,Black Oak Veneer |
Black Gloss, White Gloss, Walnut |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
Yes |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |