In this review, we will be comparing KC62 and Sub 3, two Powered Subwoofer speakers from KEF and Dynaudio. 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 Dynaudio Sub 3 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.KEF KC62 and Dynaudio Sub 3 have a totally different setup: the KEF KC62 features 2 x 6.5-inch drivers whereas the Sub 3 features 1 x 9.5-inch drivers.
Frequency Response
KC62 has a frequency range of 11-200 Hz whereas Sub 3 has a frequency range of 22-175 Hz. With a minimum frequency of 11Hz, the KC62 can go significantly deeper on the low side and provide stronger bass compared to the Sub 3's min frequency of 22Hz.
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
Both KEF KC62 and Dynaudio Sub 3 have Acoustic Suspension type cabinets. 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 KEF KC62's and Dynaudio Sub 3'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 Dynaudio Sub 3 has external dimensions of 277.0 x 269.0 x 366.0mm (10-7/8 x 10-9/16 x 14-3/8inch).
Dynaudio Sub 3 is clearly the larger of the two speakers. Its body is 11mm wider, 32mm taller and 85mm deeper than KEF KC62.
Below you can see the front view size comparison of KEF KC62 and Dynaudio Sub 3 in scale.
Comparison image of KEF KC62 and Dynaudio Sub 3 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 Dynaudio Sub 3 is approximately 984.5cm2 / 152.6inch2. The KC62 requires 26% less surface area than the Sub 3 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 Dynaudio Sub 3 weighs 10.50kg / 23.1lbs. This makes the KC62 34% heavier than the Sub 3.
Here is a comparison of how KC62 and Sub 3'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 subwoofer
- 6.5-feet AC power cord
- Speaker-level input block
- User Manual
- Important Safety Information
- Warranty Information
What's in the Box of Dynaudio Sub 3?
Here are the items that come with the Sub 3:
- Powered subwoofer
- Grille
- 6-feet AC power cord
- Owners Manual
- Quick Start Guide
- Warranty Extension Card
 Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
11 Hz
vs
22 Hz
|
Generates deeper bass |
 High Frequency Response |
200k Hz
vs
175k Hz
|
Generates higher frequency |
 Height |
245mm
vs
277mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
725cm2
vs
984cm2
|
Takes less floor space |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
| Woofer Size |
9.5 inches
vs
6.5 inches
|
Larger woofer |
| General |
KEF KC62 |
Dynaudio Sub 3 |
| Brand |
KEF |
Dynaudio |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1000 watts |
300 watts |
| Frequency Response |
11-200 Hz |
22-175 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1000-watt RMS |
300-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
1 |
| Woofer Size |
6.5" |
9.5" |
| Woofer Composition |
|
Magnesium Silicate Polymer |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
50-150Hz and 60Hz/80Hz/FlatHz |
| Firing Direction |
side |
front |
Physical Specs |
|
|
| Height |
245.0mm (9.6") |
277.0mm (10.9") |
| Width |
258.0mm (10.2") |
269.0mm (10.6") |
| Depth |
281.0mm (11.1") |
366.0mm (14.4") |
| Weight |
14.05kg (30.9lbs) |
10.50kg (23.1lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
3 Years |
| Labor Warranty |
2 Years |
3 Years |