In this review, we will be comparing KC62 and ProSub 800, two Powered Subwoofer speakers from KEF and Definitive Technology. 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 KEF KC62 and Definitive ProSub 800 first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the KEF KC62 and Definitive ProSub 800 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.KEF KC62 and Definitive ProSub 800 have a totally different setup: the KEF KC62 features 2 x 6.5-inch drivers whereas the ProSub 800 features 1 x 8-inch drivers.
Frequency Response
KC62 has a frequency range of 11-200 Hz whereas ProSub 800 has a frequency range of 20-150 Hz. With a minimum frequency of 11Hz, the KC62 can go significantly deeper on the low side and provide stronger bass compared to the ProSub 800's min frequency of 20Hz.
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 KEF KC62 has a Acoustic Suspension type cabinet. 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. On the other hand the Definitive ProSub 800 have Passive Radiator type enclosure. Passive Radiator type subwoofers sports a non-powered cone that moves in response to the main woofer to move air out in order to generate stronger bass in a smaller body compared to ported or sealed 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 KEF KC62's and Definitive ProSub 800's external dimensions. 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 ) whereas Definitive ProSub 800 has external dimensions of 328.0 x 262.0 x 423.0mm ( 12-7/8 x 10-5/16 x 16-5/8inch) .
Definitive ProSub 800 is clearly the larger of the two speakers. Its body is 4mm wider, 83mm taller and 142mm deeper than KEF KC62.
Below you can see the front view size comparison of KEF KC62 and Definitive ProSub 800 in scale.
Comparison image of KEF KC62 and Definitive ProSub 800 Size and External Dimensions
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 KEF KC62 is approximately 725.0cm2 / 112.4inch2 and base area of the Definitive ProSub 800 is approximately 1108.3cm2 / 171.8inch2. The KC62 requires 35% less surface area than the ProSub 800 which gives it a small advantage 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 KEF KC62 weighs 14.05kg / 30.9lbs and the Definitive ProSub 800 weighs 11.82kg / 26lbs. This makes the KC62 19% heavier than the ProSub 800.
Here is a comparison of how KC62 and ProSub 800's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of KEF KC62?
Here are the items that are included inside the box of KC62:
Powered subwoofer6.5-feet AC power cordSpeaker-level input blockUser ManualImportant Safety InformationWarranty Information
What's in the Box of Definitive ProSub 800?
Here are the items that come with the ProSub 800:
8-inch Powered subwooferDetachable grille (installed)7-feet AC power cordOwners ManualOnline Product Registration card
 Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
11 Hz
vs
20 Hz
|
Generates deeper bass |
 High Frequency Response |
200k Hz
vs
150k Hz
|
Generates higher frequency |
 Height |
245mm
vs
328mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
725cm2
vs
1108cm2
|
Takes less floor space |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
| Woofer Size |
8 inches
vs
6.5 inches
|
Larger woofer |
| General |
KEF KC62 |
Definitive Technology ProSub 800 |
| Brand |
KEF |
Definitive Technology |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1000 watts |
300 watts |
| Frequency Response |
11-200 Hz |
20-150 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1000-watt RMS |
300-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
1 |
| Woofer Size |
6.5" |
8" |
| Woofer Composition |
|
Polymer |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
40-150 Hz and 80 Hz |
| Firing Direction |
side |
front |
Physical Specs |
|
|
| Height |
245.0mm (9.6") |
328.0mm (12.9") |
| Width |
258.0mm (10.2") |
262.0mm (10.3") |
| Depth |
281.0mm (11.1") |
423.0mm (16.7") |
| Weight |
14.05kg (30.9lbs) |
11.82kg (26lbs) |
| Enclosure |
Acoustic Suspension |
Passive Radiator |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
3 Years |
| Labor Warranty |
2 Years |
3 Years |