In this review, we will be comparing DB2D and SW-15, two Powered Subwoofer speakers from Bowers Wilkins and Wharfedale. 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 B&W DB2D and Wharfedale SW-15 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.B&W DB2D and Wharfedale SW-15 have a totally different setup: the B&W DB2D features 2 x 10-inch drivers whereas the SW-15 features 1 x 15-inch drivers.
Frequency Response
DB2D has a frequency range of 10-350 Hz whereas SW-15 has a frequency range of 30-120 Hz. With a minimum frequency of 10Hz, the DB2D can go significantly deeper on the low side and provide stronger bass compared to the SW-15's min frequency of 30Hz.
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 B&W DB2D 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 Wharfedale SW-15 have Bass Reflex type enclosure. Bass Reflex type subwoofers (aka Ported, Vented or Reflex Port) have enclosures that uses a port, hole or vent cut into the cabinet. Ported designs are generally more efficient than the Sealed 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 B&W DB2D's and Wharfedale SW-15's external dimensions. B&W DB2D has external dimensions of 386.0 x 431.0 x 410.0mm (15-3/16inch x 16-15/16inch x 16-1/8inch) whereas Wharfedale SW-15 has external dimensions of 570.0 x 493.0 x 615.0mm (22-7/16inch x 19-3/8inch x 24-3/16inch).
Wharfedale SW-15 is clearly the larger of the two speakers. Its body is 62mm wider, 184mm taller and 205mm deeper than B&W DB2D.
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 B&W DB2D is approximately 1767.1cm2 / 273.9inch2 and base area of the Wharfedale SW-15 is approximately 3032.0cm2 / 470.0inch2. The DB2D requires 42% less surface area than the SW-15 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 B&W DB2D weighs 36.09kg / 79.4lbs and the Wharfedale SW-15 weighs 31.57kg / 69.5lbs. This makes the DB2D 14% heavier than the SW-15.
Here is a comparison of how DB2D and SW-15's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
What's in the Box of B&W DB2D?
Here are the items that are included inside the box of DB2D:
- Powered subwoofer
- 2 Grilles
- 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
What's in the Box of Wharfedale SW-15?
Here are the items that come with the SW-15:
- Powered subwoofer
- Grille
- 6.5-feet AC power cord
- User-feets Manual
 Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
10 Hz
vs
30 Hz
|
Generates deeper bass |
 High Frequency Response |
350 Hz
vs
120 Hz
|
Generates higher frequency |
 Height |
386mm
vs
570mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1767cm2
vs
3032cm2
|
Takes less floor space |
| Woofer Size |
15 inches
vs
10 inches
|
Larger woofer |
 Price per pair* |
1199USD
vs
4499USD
|
costs less (*prices may change depending on the seller, location and time) |
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.
Wharfedale SW-15 needs about 72% more floor area. Wharfedale SW-15 stands 205mm further into the room. Wharfedale SW-15 is 184mm taller.
| General |
Bowers & Wilkins DB2D |
Wharfedale SW-15 |
| Brand |
Bowers Wilkins |
Wharfedale |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1000 watts |
400 watts |
| Frequency Response |
10-350 Hz |
30-120 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1000-watt RMS |
400-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
1 |
| Woofer Size |
10" |
15" |
| Woofer Composition |
Aerofoil |
Paper |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
386.0mm (15.2") |
570.0mm (22.4") |
| Width |
431.0mm (17") |
493.0mm (19.4") |
| Depth |
410.0mm (16.1") |
615.0mm (24.2") |
| Weight |
36.09kg (79.4lbs) |
31.57kg (69.5lbs) |
| Enclosure |
Acoustic Suspension |
Bass Reflex |
| Available Colors |
Gloss Black,Satin White |
n/a |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
3 Years |
| Labor Warranty |
2 Years |
3 Years |
A sealed subwoofer against a ported one. That is the most consequential line on this page: it decides how the bass rolls off, how it behaves in a small room, and how much output you get for the size of the box.
| Area | Better | Why |
|---|
| Bass depth | A | B&W DB2D goes deeper - 10Hz against 30Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | A | B&W DB2D has the bigger amplifier - 1000W against 400W RMS, about 4dB 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 10" against 15"). |
| Enclosure | depends | B&W DB2D is sealed - a sealed box rolls off gently and is usually the easier one to integrate in a small or awkward room; Wharfedale SW-15 is ported - a ported box gives more output low down for its size, at the cost of a steeper roll-off below tuning. Neither is better in the abstract; ported tends to suit films and sealed tends to suit music, and both generalisations have exceptions. |
| Driver placement | depends | B&W DB2D fires side and Wharfedale SW-15 fires front. A down-firing driver is more forgiving of a grille-less look and of a hard floor; a front-firing one is the safer choice on a thick carpet or a suspended timber floor. |
| Cabinet size | depends | B&W DB2D is about 61% 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. |
| Warranty | B | Wharfedale SW-15 carries 3 years on parts against 2 years. A subwoofer amplifier works harder than anything else in the system, so this is not a throwaway line. |
| Price | B | Wharfedale SW-15 costs less - $1,199 against $4,499, about 73% less. |
A B&W DB2D B Wharfedale SW-15
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 DB2D is ahead, but on only 1 of the measured areas, and it costs about 3.8x the price. Wharfedale SW-15 is the sensible buy unless your room is large enough to need the extra. Films or music? If this is mainly a home cinema, Wharfedale SW-15 will hit harder for the money; if it is mainly for music in a normal-sized room, B&W DB2D is usually the easier one to make sound right. 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 $1,199 each, two Wharfedale SW-15 cost about $2,398 against $4,499 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.