In this review, we will be comparing Kube 10 MIE and DB4S, two Powered Subwoofer speakers from KEF and Bowers Wilkins. 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 Kube 10 MIE and B&W DB4S 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.KEF Kube 10 MIEand B&W DB4S have the same driver set up: Both subwoofers have 1 x 10" drivers.
Frequency Response
Kube 10 MIE has a frequency range of 20-140 Hz whereas DB4S has a frequency range of 10-350 Hz. With a minimum frequency of 10Hz, the DB4S can go significantly deeper on the low side and provide stronger bass compared to the Kube 10 MIE'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
Both KEF Kube 10 MIE and B&W DB4S 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 Kube 10 MIE's and B&W DB4S's external dimensions. KEF Kube 10 MIE has external dimensions of 370 x 353 x 370 mm (14.6 x 13.9 x 14.6 in) whereas B&W DB4S has external dimensions of 375.0 x 362.0 x 434.0mm (14-3/4 x 14-1/4 x 17-1/16inch).
B&W DB4S is clearly the larger of the two speakers. Its body is 9mm wider, 5mm taller and 64mm deeper than KEF Kube 10 MIE.
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 Kube 10 MIE is approximately 1306.1cm2 / 202.4inch2 and base area of the B&W DB4S is approximately 1571.1cm2 / 243.5inch2. The Kube 10 MIE requires 17% less surface area than the DB4S 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 Kube 10 MIE weighs 15.40kg / 33.9lbs and the B&W DB4S weighs 26.05kg / 57.3lbs. This makes the DB4S 69% heavier than the Kube 10 MIE.
Here is a comparison of how Kube 10 MIE and DB4S'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 Kube 10 MIE?
Here are the items that are included inside the box of Kube 10 MIE:
- Kube 10 MIE subwoofer
- Power cord
- Euroblock speaker level connector
- User manual and warranty information
What's in the Box of B&W DB4S?
Here are the items that come with the DB4S:
- Powered subwoofer
- Grille
- 6.5-feet AC power cord
- 4 Decoupling feet
- 4 Rubber feet
- 4 Spike feet
- 4 Lock-nuts
- Cleaning cloth
- Quickstart Guide
- Bowers & Wilkins brochure
- Warranty Information
- Cleaning cloth instructions
 Height |
370mm
vs
375mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1306cm2
vs
1571cm2
|
Takes less floor space |
 Price per pair* |
799USD
vs
2199USD
|
costs less (*prices may change depending on the seller, location and time) |
 Wireless Operation |
Optional
vs
No
|
Connect your subwoofer to your system wireless |
 Low Frequency Response |
10 Hz
vs
20 Hz
|
Generates deeper bass |
 High Frequency Response |
350 Hz
vs
140 Hz
|
Generates higher frequency |
 App-Based Control |
iOS,Android
vs
None
|
Control the speaker via an app |
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.
B&W DB4S needs about 20% more floor area. B&W DB4S stands 64mm further into the room.
| General |
KEF Kube 10 MIE |
Bowers & Wilkins DB4S |
| Brand |
KEF |
Bowers Wilkins |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
300 watts |
1000 watts |
| Frequency Response |
20-140 Hz |
10-350 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
300-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
10" |
10" |
| Woofer Composition |
Polypropylene |
Aerofoil |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
40-140 Hz |
n/a |
| Firing Direction |
n/a |
front |
Physical Specs |
|
|
| Height |
370.0mm (14.6") |
375.0mm (14.8") |
| Width |
353.0mm (13.9") |
362.0mm (14.3") |
| Depth |
370.0mm (14.6") |
434.0mm (17.1") |
| Weight |
15.40kg (33.9lbs) |
26.05kg (57.3lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
2 Years |
| Labor Warranty |
2 Years |
2 Years |
Different price classes - B&W DB4S costs roughly 2.8x what KEF Kube 10 MIE does. Before paying it, read the note below about two smaller subwoofers.
| Area | Better | Why |
|---|
| Bass depth | B | B&W DB4S goes deeper - 10Hz against 20Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | B | B&W DB4S has the bigger amplifier - 1000W against 300W RMS, about 5.2dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | evenly matched | Near-identical radiating area (10" against 10"). |
| Enclosure | evenly matched | Both are sealed designs, so they roll off in much the same way. |
| Speaker-level inputs | A | KEF Kube 10 MIE takes a speaker-level connection as well as line level. That is what lets it work with an integrated amplifier or a vintage receiver that has no subwoofer output at all. |
| Wireless option | depends | Only KEF Kube 10 MIE offers a wireless link (as a paid option). It decides where the sub can go if you cannot run a cable, and is worth nothing if you can. |
| Cabinet size | depends | KEF Kube 10 MIE is about 18% 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 | KEF Kube 10 MIE costs less - $799 against $2,199, about 64% less. |
A KEF Kube 10 MIE B B&W DB4S
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?
B&W DB4S is ahead, but on only 1 of the measured areas, and it costs about 2.8x the price. KEF Kube 10 MIE is the sensible buy unless your room is large enough to need the extra. Check your amplifier first: if it has no subwoofer or preamp output, KEF Kube 10 MIE is the only one of these two you can connect at all. Two small subwoofers beat one big one in most rooms - a pair evens out the room modes in a way no single box can, whatever its specs. At $799 each, two KEF Kube 10 MIE cost about $1,598 against $2,199 for one of the other, which is worth a thought.
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.