In this review, we will be comparing PULSE SUB and KC62, two Powered Subwoofer speakers from Bluesound 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 Bluesound PULSE SUB 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.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Bluesound PULSE SUBand KEF KC62 have the same driver set up: Both subwoofers have 2 x 6.5" drivers.
Frequency Response
PULSE SUB has a frequency range of whereas KC62 has a frequency range of 11-200 Hz. With a minimum frequency of Hz, the PULSE SUB can go significantly deeper on the low side and provide stronger bass compared to the KC62's min frequency of 11Hz.
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
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 Bluesound PULSE SUB's and KEF KC62's external dimensions. Bluesound PULSE SUB has external dimensions of 330 x 292 x 315 mm () 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).
Bluesound PULSE SUB is clearly the larger of the two speakers. Its body is 34mm wider, 85mm taller and 34mm deeper than KEF KC62.
Size, drawn to scale
Both speakers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same surface and pushed back to the same wall, so the deeper one visibly sticks out further.
Bluesound PULSE SUB needs about 27% more floor or shelf area. Bluesound PULSE SUB is 34mm deeper, so it stands that much further out from the wall. Bluesound PULSE SUB is 85mm taller.
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 Bluesound PULSE SUB is approximately 919.8cm2 / 142.6inch2 and base area of the KEF KC62 is approximately 725.0cm2 / 112.4inch2. The PULSE SUB requires 27% 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 Bluesound PULSE SUB weighs 10.00kg / 22lbs and the KEF KC62 weighs 14.05kg / 30.9lbs. This makes the KC62 41% heavier than the PULSE SUB.
Here is a comparison of how PULSE SUB and KC62's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 Low Frequency Response |
Hz
vs
11 Hz
|
Generates deeper bass |
 App-Based Control |
BluOS Controller (iOS, Android, Windows, macOS)
vs
None
|
Control the speaker via an app |
 Price per pair* |
1299USD
vs
1500USD
|
costs less (*prices may change depending on the seller, location and time) |
 Ethernet Connection |
Yes
vs
No
|
High quality streaming over Ethernet |
 High Frequency Response |
200 Hz
vs
Hz
|
Generates higher frequency |
 Height |
245mm
vs
330mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
725cm2
vs
919cm2
|
Takes less floor space |
Size, drawn to scale
Both subwoofers and both views share one scale, so everything here is directly comparable. Hover a box for its dimensions.
One scale for both, standing on the same floor and pushed back to the same wall, so the bigger one visibly takes more of the room.
Bluesound PULSE SUB needs about 27% more floor area. Bluesound PULSE SUB stands 34mm further into the room. Bluesound PULSE SUB is 85mm taller.
| General |
Bluesound PULSE SUB |
KEF KC62 |
| Brand |
Bluesound |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Frequency Response |
|
11-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
350-watt RMS |
1000-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
2 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
|
|
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
side |
Physical Specs |
|
|
| Height |
330.0mm (13") |
245.0mm (9.6") |
| Width |
292.0mm (11.5") |
258.0mm (10.2") |
| Depth |
315.0mm (12.4") |
281.0mm (11.1") |
| Weight |
10.00kg (22lbs) |
14.05kg (30.9lbs) |
| Enclosure |
|
Acoustic Suspension |
| Finish |
Matte satin paint |
n/a |
| Available Colors |
Black, White/Tan |
n/a |
| Grille |
Removable magnetic |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Ethernet Port |
Yes |
n/a |
Other |
|
|
| Parts Warranty |
|
2 Years |
| Labor Warranty |
|
2 Years |
No single best subwoofer here. Your room, where the box can physically go, and whether this is mainly for films or mainly for music will settle it long before the specs do.
| Area | Better | Why |
|---|
| Amplifier power | B | KEF KC62 has the bigger amplifier - 1000W against 350W RMS, about 4.6dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | evenly matched | Near-identical radiating area (2 x 6.5" against 2 x 6.5"). |
| Cabinet size | depends | KEF KC62 is about 41% smaller by volume. In a subwoofer that is a real trade rather than a preference: box volume is how you get output low down without a bigger amplifier. |
| Price | A | Bluesound PULSE SUB costs less - $1,299 against $1,500, about 13% less. |
A Bluesound PULSE SUB B KEF KC62
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both subwoofers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
The usual trade-off: KEF KC62 measures better, Bluesound PULSE SUB costs about 13% less. In a normal room, placement will make a bigger difference than the gap between these two. If placement is the constraint - a corner, behind a sofa, under a desk - KEF KC62 is the one that will actually go there, and a well-placed small subwoofer beats a badly-placed big one every time.
One thing outweighs everything above: where the subwoofer stands. Room modes can add or remove 10dB or more at a given seat, which is far larger than any difference on this page. Before spending more, try the sub in two or three positions - the crawl test, where you put it in the listening seat and crawl the room to find where the bass sounds best, costs nothing and usually beats an upgrade.