In this review, we will be comparing SB16-Ultra and KF92, two Powered Subwoofer speakers from SVS 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 SVS SB16-Ultra and KEF KF92 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.SVS SB16-Ultra and KEF KF92 have a totally different setup: the SVS SB16-Ultra features 1 x 16-inch drivers whereas the KF92 features 2 x 9-inch drivers.
Frequency Response
SB16-Ultra has a frequency range of 16-460 Hz whereas KF92 has a frequency range of 11-200 Hz. With a minimum frequency of 11Hz, the KF92 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 KEF KF92 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 KEF KF92'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 KEF KF92 has external dimensions of 353.0 x 331.0 x 362.0mm (13-7/8 x 13 x 14-1/4inch).
SVS SB16-Ultra is clearly the larger of the two speakers. Its body is 165mm wider, 155mm taller and 150mm deeper than KEF KF92.
Below you can see the front view size comparison of SVS SB16-Ultra and KEF KF92 in scale.
Comparison image of SVS SB16-Ultra and KEF KF92 Size and External Dimensions
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 KEF KF92 is approximately 1198.2cm2 / 185.7inch2. The SB16-Ultra requires 112% more surface area than the KF92 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 KEF KF92 weighs 20.05kg / 44.1lbs. This makes the SB16-Ultra 177% heavier than the KF92.
Here is a comparison of how SB16-Ultra and KF92'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 KEF KF92?
Here are the items that come with the KF92:
- Powered subwoofer
- 6.5-feet AC power cord
- Speaker-level input block
- User Manual
- Important Safety Information
- Warranty Information
 Woofer Size |
16 inches
vs
9 inches
|
Larger woofer |
 High Frequency Response |
460 Hz
vs
200 Hz
|
Generates higher frequency |
 Handheld Remote |
Yes
vs
No
|
Control the speaker by the included RC |
 App-Based Control |
iOS,Android
vs
None
|
Control the speaker via an app |
| Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
11 Hz
vs
16 Hz
|
Generates deeper bass |
 Height |
353mm
vs
508mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
1198cm2
vs
2539cm2
|
Takes less floor space |
 Price per pair* |
2000USD
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 112% more floor area. SVS SB16-Ultra stands 150mm further into the room. SVS SB16-Ultra is 155mm taller.
| General |
SVS SB16-Ultra |
KEF KF92 |
| Brand |
SVS |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1500 watts |
1000 watts |
| Frequency Response |
16-460 Hz |
11-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1500-watt RMS |
1000-watt RMS |
Drivers |
|
|
| Woofer Quantity |
1 |
2 |
| Woofer Size |
16" |
9" |
| Woofer Composition |
Composite fiberglass/resin |
Hybrid aluminum |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
front |
n/a |
Physical Specs |
|
|
| Height |
508.0mm (20") |
353.0mm (13.9") |
| Width |
496.0mm (19.5") |
331.0mm (13") |
| Depth |
512.0mm (20.2") |
362.0mm (14.3") |
| Weight |
55.45kg (122lbs) |
20.05kg (44.1lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
5 Years |
2 Years |
| Labor Warranty |
5 Years |
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 KF92 goes deeper - 11Hz 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 2 x 9" is 1.58x the cone area, not the 1.26x 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. |
| Speaker-level inputs | B | KEF KF92 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. |
| Cabinet size | depends | KEF KF92 is about 67% 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 | B | KEF KF92 costs less - $2,000 against $2,300, about 13% less. |
A SVS SB16-Ultra B KEF KF92
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?
The usual trade-off: SVS SB16-Ultra measures better, KEF KF92 costs about 13% less. In a normal room, placement will make a bigger difference than the gap between these two. Check your amplifier first: if it has no subwoofer or preamp output, KEF KF92 is the only one of these two you can connect at all. If placement is the constraint - a corner, behind a sofa, under a desk - KEF KF92 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.