In this review, we will be comparing Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer and KC62, two Powered Subwoofer speakers from Aperion 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 Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer and KEF KC62 first before getting into our more detailed comparison.
The sections below take each area in turn: driver and amplifier, frequency response, physical size and connectivity.
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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.Both Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwooferand KEF KC62 have a double woofer setup however the Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer's woofer is 15-inch whereas the KEF KC62 features a 6.5-inch woofer.
Frequency Response
Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer has a frequency range of 17-180 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 Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer's min frequency of 17Hz.
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
Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer
High Frequency
Subwoofer Speakers
Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer
Cabinet Type
The Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer 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
The size of a speaker can sometimes be an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer's and KEF KC62's external dimensions. Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer has external dimensions of 1099.8 x 551.2 x 299.7mm (43.3 x 21.7 x 11.8inch) 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).
Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer is clearly the larger of the two speakers. Its body is 293.2mm wider, 854.8mm taller and 18.7mm 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 Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer is approximately 1651.9cm2 / 256.0inch2 and base area of the KEF KC62 is approximately 725.0cm2 / 112.4inch2. The Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer requires 128% 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 Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer weighs 71.53kg / 157.4lbs and the KEF KC62 weighs 14.05kg / 30.9lbs. This makes the Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer 409% heavier than the KC62.
Here is a comparison of how Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer and KC62's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer
 Woofer Size |
15 inches
vs
6.5 inches
|
Larger woofer |
| Low Frequency Response |
11 Hz
vs
17 Hz
|
Generates deeper bass |
 High Frequency Response |
200k Hz
vs
180k Hz
|
Generates higher frequency |
 Height |
245mm
vs
1099mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
725cm2
vs
1651cm2
|
Takes less floor space |
 Price per pair* |
1500USD
vs
4499USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Aperion Bravus III B215S Dual 15" Slim Cinema Powered Subwoofer |
KEF KC62 |
| Brand |
Aperion |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1300 watts |
1000 watts |
| Impedance |
4 ohms |
n/a |
| Frequency Response |
17-180 Hz |
11-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1300-watt RMS |
1000-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
15" |
6.5" |
| Woofer Composition |
|
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
40-160 Hz |
n/a |
| Firing Direction |
n/a |
side |
Physical Specs |
|
|
| Height |
1099.8mm (43.3") |
245.0mm (9.6") |
| Width |
551.2mm (21.7") |
258.0mm (10.2") |
| Depth |
299.7mm (11.8") |
281.0mm (11.1") |
| Weight |
71.53kg (157.4lbs) |
14.05kg (30.9lbs) |
| Enclosure |
Bass Reflex |
Acoustic Suspension |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
|
2 Years |
| Labor Warranty |
|
2 Years |