In this review, we will be comparing Descend DN15 and DB4S, two Powered Subwoofer speakers from Definitive Technology 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 Definitive DN15 and B&W DB4S first before getting into our more detailed comparison.
In the following sections, we will get into details in order to better understand how the Definitive DN15 and B&W DB4S compare and hopefully end up with enough arguments to decide which one of these subwoofers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Both Definitive DN15and B&W DB4S have a single woofer setup however the Definitive DN15's woofer is 15-inch whereas the B&W DB4S features a 10-inch woofer.
Frequency Response
Descend DN15 has a frequency range of 20-150 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 Descend DN15'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
The Definitive DN15 has a Passive Radiator type cabinet. Passive Radiator type subwoofers sports a non-powered cone that moves in response to the main woofer to move air out in order to generate stronger bass in a smaller body compared to ported or sealed designs. On the other hand the B&W DB4S have Acoustic Suspension type enclosure. 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
Size of a speaker can sometimes become an important decision factor due to space constraints or in some cases purely for esthetic reasons. In this section, we are going to compare Definitive DN15's and B&W DB4S's external dimensions. Definitive DN15 has external dimensions of 634.0 x 596.0 x 640.0mm ( 24-15/16inch x 23-7/16inch x 25-3/16inch ) 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) .
Definitive DN15 is clearly the larger of the two speakers. Its body is 234mm wider, 259mm taller and 206mm deeper than B&W DB4S.
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 Definitive DN15 is approximately 3814.4cm2 / 591.2inch2 and base area of the B&W DB4S is approximately 1571.1cm2 / 243.5inch2. The Descend DN15 requires 143% more surface area than the DB4S 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 Definitive DN15 weighs 52.09kg / 114.6lbs and the B&W DB4S weighs 26.05kg / 57.3lbs. This makes the Descend DN15 100% heavier than the DB4S.
Here is a comparison of how Descend DN15 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 Definitive DN15?
Here are the items that are included inside the box of Descend DN15:
Powered subwoofer6-feet AC power cordRemote controlCR2032 3V battery (pre-installed in remote)Owners Manual
What's in the Box of B&W DB4S?
Here are the items that come with the DB4S:
Powered subwooferGrille6.5-feet AC power cord4 Decoupling feet4 Rubber feet4 Spike feet4 Lock-nutsCleaning clothQuickstart GuideBowers & Wilkins brochureWarranty InformationCleaning cloth instructions
 Woofer Size |
15 inches
vs
10 inches
|
Larger woofer |
 Passive Radiator |
2 x 15-inch
vs
None
|
Increases the bass performance |
 Price per pair* |
1799USD
vs
2199USD
|
costs less (*prices may change depending on the seller, location and time) |
| Low Frequency Response |
10 Hz
vs
20 Hz
|
Generates deeper bass |
 High Frequency Response |
350k Hz
vs
150k Hz
|
Generates higher frequency |
| App-Based Control |
iOS,Android
vs
None
|
Control the speaker via an app |
 Height |
375mm
vs
634mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1571cm2 (362x434mm)
vs
3814cm2 (596x640mm)
|
Takes less floor space |
| General |
Definitive Technology Descend DN15 |
Bowers & Wilkins DB4S |
| Brand |
Definitive Technology |
Bowers Wilkins |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
500 watts |
1000 watts |
| Frequency Response |
20-150 Hz |
10-350 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
500-watt RMS |
0-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
15" |
10" |
| Woofer Composition |
Polypropylene |
Aerofoil |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
634.0mm (25") |
375.0mm (14.8") |
| Width |
596.0mm (23.5") |
362.0mm (14.3") |
| Depth |
640.0mm (25.2") |
434.0mm (17.1") |
| Weight |
52.09kg (114.6lbs) |
26.05kg (57.3lbs) |
| Enclosure |
Passive Radiator |
Acoustic Suspension |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
3 Years |
2 Years |
| Labor Warranty |
3 Years |
2 Years |