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 SUB+ and KEF KC62 have a totally different setup: the Bluesound PULSE SUB+ features 1 x 8-inch drivers whereas the KC62 features 2 x 6.5-inch drivers.
Frequency Response
PULSE SUB+ has a frequency range of 22-150 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 PULSE SUB+'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
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 300 x 457 x 146 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).
KEF KC62 is 199mm narrower and 55mm shorter than Bluesound PULSE SUB+ but it is also 135mm deeper.
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.
KEF KC62 needs about 9% more floor or shelf area. KEF KC62 is 135mm deeper, so it stands that much further out from the wall. Bluesound PULSE SUB+ is 55mm 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 667.2cm2 / 103.4inch2 and base area of the KEF KC62 is approximately 725.0cm2 / 112.4inch2. The PULSE SUB+ requires 8% less surface area than the KC62 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 Bluesound PULSE SUB+ weighs 8.28kg / 18.2lbs and the KEF KC62 weighs 14.05kg / 30.9lbs. This makes the KC62 70% 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
 Woofer Size |
8 inches
vs
6.5 inches
|
Larger woofer |
 App-Based Control |
BluOS Controller (iOS, Android)
vs
None
|
Control the speaker via an app |
 Base Surface Area |
667cm2
vs
725cm2
|
Takes less floor space |
 Price per pair* |
1149USD
vs
1500USD
|
costs less (*prices may change depending on the seller, location and time) |
 Ethernet Connection |
Yes
vs
No
|
High quality streaming over Ethernet |
| Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
11 Hz
vs
22 Hz
|
Generates deeper bass |
 High Frequency Response |
200 Hz
vs
150 Hz
|
Generates higher frequency |
 Height |
245mm
vs
300mm
|
Easier to fit in smaller spaces |
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.
KEF KC62 needs about 9% more floor area. KEF KC62 stands 135mm further into the room. Bluesound PULSE SUB+ is 55mm taller.
| General |
Bluesound PULSE SUB+ |
KEF KC62 |
| Brand |
Bluesound |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Frequency Response |
22-150 Hz |
11-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
150-watt RMS |
1000-watt RMS |
| Watts Peak (Max) |
200-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
1 |
2 |
| Woofer Size |
8" |
6.5" |
| Woofer Composition |
Polypropylene |
|
| Woofer Surround Material |
Rubber |
n/a |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
side |
Physical Specs |
|
|
| Height |
300.0mm (11.8") |
245.0mm (9.6") |
| Width |
457.0mm (18") |
258.0mm (10.2") |
| Depth |
146.0mm (5.7") |
281.0mm (11.1") |
| Weight |
8.28kg (18.2lbs) |
14.05kg (30.9lbs) |
| Enclosure |
|
Acoustic Suspension |
| Finish |
Matte |
n/a |
| Available Colors |
Black, White |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| USB Port |
Type A (upgrade only), Type B mini (service) |
n/a |
| 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 |
|---|
| Bass depth | B | KEF KC62 goes deeper - 11Hz against 22Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | B | KEF KC62 has the bigger amplifier - 1000W against 150W RMS, about 8.2dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | B | KEF KC62 moves more air: 2 x 6.5" against 8" is 1.32x the cone area, not the 1.15x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Price | A | Bluesound PULSE SUB+ costs less - $1,149 against $1,500, about 23% 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?
KEF KC62 leads across most of the measured areas for a modest premium, so it is the easier pick if the budget stretches. Bluesound PULSE SUB+ is the one to take if it does not.
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.