In this review, we will be comparing Airmotiv XS12e and KC62, two Powered Subwoofer speakers from Emotiva and KEF. Being Powered subwoofers, they both have built-in amplifiers so you don't need an external power amp or an integrated amp to power them. Let's have a brief look at the main features of Emotiva Airmotiv XS12e and KEF KC62 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the Emotiva Airmotiv XS12e and KEF KC62 compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
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Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Emotiva Airmotiv XS12e and KEF KC62 have a totally different setup: the Emotiva Airmotiv XS12e features 1 x 12-inch drivers whereas the KC62 features 2 x 6.5-inch drivers.
Frequency Response
Airmotiv XS12e has a frequency range of 28-200 Hz whereas KC62 has a frequency range of 11-200 Hz. With a minimum frequency of 11Hz, the KC62 can go significantly deeper on the low side and provide stronger bass compared to the Airmotiv XS12e's min frequency of 28Hz.
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 Subwoofer class in our database.
Low Frequency
Subwoofer Speakers
High Frequency
Subwoofer Speakers
Cabinet Type
The Emotiva Airmotiv XS12e has a Bass Reflex type cabinet. Bass Reflex type subwoofers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed designs. On the other hand the KEF KC62 have Acoustic Suspension type enclosure. Acoustic Suspension aka Sealed type subwoofers have enclosures that are sealed hence no ports or holes exists on the cabinet. Sealed designs helps to provide more accurate and tight bass responses compared to ported designs.
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 XS12e's and KEF KC62's external dimensions. Emotiva Airmotiv XS12e has external dimensions of 400.0 x 400.0 x 400.0mm ( 15-3/4 x 15-3/4 x 15-3/4inch) whereas KEF KC62 has external dimensions of 245.0 x 258.0 x 281.0mm ( 9-5/8inch x 10-1/8inch x 11-1/16inch ) .
Emotiva Airmotiv XS12e is clearly the larger of the two speakers. Its body is 142mm wider, 155mm taller and 119mm deeper than KEF KC62.
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 XS12e is approximately 1600.0cm2 / 248.0inch2 and base area of the KEF KC62 is approximately 725.0cm2 / 112.4inch2. The Airmotiv XS12e requires 121% more surface area than the KC62 which gives it a small disadvantage on placement in tight spaces.
Weight Comparison The weight of a subwoofer may become an important factor if you need to move and reposition the unit often to find the optimal positioning, also known as 'Subwoofer Crawling'. The Emotiva Airmotiv XS12e weighs 19.05kg / 41.9lbs and the KEF KC62 weighs 14.05kg / 30.9lbs. This makes the Airmotiv XS12e 36% heavier than the KC62.
Here is a comparison of how Airmotiv XS12e and KC62's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Woofer Size |
12 inches
vs
6.5 inches
|
Larger woofer |
 Price per pair* |
399USD
vs
1500USD
|
costs less (*prices may change depending on the seller, location and time) |
| Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
11 Hz
vs
28 Hz
|
Generates deeper bass |
 Height |
245mm
vs
400mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
725cm2
vs
1600cm2
|
Takes less floor space |
| General |
Emotiva Airmotiv XS12e |
KEF KC62 |
| Brand |
Emotiva |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
300 watts |
1000 watts |
| Frequency Response |
28-200 Hz |
11-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
300-watt RMS |
1000-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
2 |
| Woofer Size |
12" |
6.5" |
| Woofer Composition |
Treated paper |
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
rear |
side |
Physical Specs |
|
|
| Height |
400.0mm (15.7") |
245.0mm (9.6") |
| Width |
400.0mm (15.7") |
258.0mm (10.2") |
| Depth |
400.0mm (15.7") |
281.0mm (11.1") |
| Weight |
19.05kg (41.9lbs) |
14.05kg (30.9lbs) |
| Enclosure |
Bass Reflex |
Acoustic Suspension |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
5 Years |
2 Years |
| Labor Warranty |
5 Years |
2 Years |