In this review, we will be comparing SB16-Ultra and DB4S, two Powered Subwoofer speakers from SVS 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 SVS SB16-Ultra 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.Both SVS SB16-Ultraand B&W DB4S have a single woofer setup however the SVS SB16-Ultra's woofer is 16-inch whereas the B&W DB4S features a 10-inch woofer.
Frequency Response
SB16-Ultra has a frequency range of 16-460 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 SB16-Ultra's min frequency of 16Hz.
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 SVS SB16-Ultra 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 SVS SB16-Ultra's and B&W DB4S's external dimensions. SVS SB16-Ultra has external dimensions of 508.0 x 496.0 x 512.0mm (20 x 19-1/2 x 20-1/8inch) 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).
SVS SB16-Ultra is clearly the larger of the two speakers. Its body is 134mm wider, 133mm taller and 78mm deeper than B&W DB4S.
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.
SVS SB16-Ultra needs about 62% more floor or shelf area. SVS SB16-Ultra is 78mm deeper, so it stands that much further out from the wall. SVS SB16-Ultra is 133mm 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 SVS SB16-Ultra is approximately 2539.5cm2 / 393.6inch2 and base area of the B&W DB4S is approximately 1571.1cm2 / 243.5inch2. The SB16-Ultra requires 62% 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 SVS SB16-Ultra weighs 55.45kg / 122lbs and the B&W DB4S weighs 26.05kg / 57.3lbs. This makes the SB16-Ultra 113% heavier than the DB4S.
Here is a comparison of how SB16-Ultra 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 SVS SB16-Ultra?
Here are the items that are included inside the box of SB16-Ultra:
- Powered subwoofer
- Grille
- 8-feet AC power cord
- Remote control
- Owners Manual
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
 Woofer Size |
16 inches
vs
10 inches
|
Larger woofer |
 High Frequency Response |
460 Hz
vs
350 Hz
|
Generates higher frequency |
 Handheld Remote |
Yes
vs
No
|
Control the speaker by the included RC |
| Low Frequency Response |
10 Hz
vs
16 Hz
|
Generates deeper bass |
 Height |
375mm
vs
508mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1571cm2
vs
2539cm2
|
Takes less floor space |
 Price per pair* |
2199USD
vs
2300USD
|
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.
SVS SB16-Ultra needs about 62% more floor area. SVS SB16-Ultra stands 78mm further into the room. SVS SB16-Ultra is 133mm taller.
| General |
SVS SB16-Ultra |
Bowers & Wilkins DB4S |
| Brand |
SVS |
Bowers Wilkins |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1500 watts |
1000 watts |
| Frequency Response |
16-460 Hz |
10-350 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1500-watt RMS |
n/a |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
16" |
10" |
| Woofer Composition |
Composite fiberglass/resin |
Aerofoil |
| Woofer Surround Material |
n/a |
Rubber |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
front |
Physical Specs |
|
|
| Height |
508.0mm (20") |
375.0mm (14.8") |
| Width |
496.0mm (19.5") |
362.0mm (14.3") |
| Depth |
512.0mm (20.2") |
434.0mm (17.1") |
| Weight |
55.45kg (122lbs) |
26.05kg (57.3lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
5 Years |
2 Years |
| Labor Warranty |
5 Years |
2 Years |
Two quite different sizes of subwoofer. Room volume decides this more than anything else on the page: a big driver in a small room is wasted, and a small one in a large room is worked to death.
| Area | Better | Why |
|---|
| Bass depth | B | B&W DB4S goes deeper - 10Hz against 16Hz. Under 20Hz is felt more than heard - the bottom of a pipe organ and the bottom of a film mix. |
| Amplifier power | A | SVS SB16-Ultra has the bigger amplifier - 1500W against 1000W RMS, about 1.8dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | A | SVS SB16-Ultra moves more air: 16" against 10" is 2.56x the cone area, not the 1.6x the diameters suggest. More area means the same output with less excursion, and less distortion with it. |
| Enclosure | evenly matched | Both are sealed designs, so they roll off in much the same way. |
| Setup and tuning | evenly matched | The same tuning tools on both (app control). |
| Cabinet size | depends | B&W DB4S is about 54% 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 | A | SVS SB16-Ultra carries 5 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 | evenly matched | Priced within a few per cent of each other. |
A SVS SB16-Ultra 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?
SVS SB16-Ultra has the edge on paper, though not by much. The "depends" rows are more likely to decide this than the score is. If placement is the constraint - a corner, behind a sofa, under a desk - B&W DB4S 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.