In this review, we will be comparing KF92 and Sub 6, two Powered Subwoofer speakers from KEF and Dynaudio. 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 KF92 and Dynaudio Sub 6 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 KF92 and Dynaudio Sub 6 have a totally different setup: the KEF KF92 features 2 x 9-inch drivers whereas the Sub 6 features 1 x 9.5-inch drivers.
Frequency Response
KF92 has a frequency range of 11-200 Hz whereas Sub 6 has a frequency range of 16-230 Hz. With a minimum frequency of 11Hz, the KF92 can go significantly deeper on the low side and provide stronger bass compared to the Sub 6'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 KEF KF92 and Dynaudio Sub 6 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 KF92's and Dynaudio Sub 6's external dimensions. KEF KF92 has external dimensions of 353.0 x 331.0 x 362.0mm (13-7/8 x 13 x 14-1/4inch) whereas Dynaudio Sub 6 has external dimensions of 334.0 x 477.0 x 312.0mm (13-1/8 x 18-3/4 x 12-1/4inch).
Dynaudio Sub 6 is 19mm shorter and 50mm less deeper than KEF KF92 but it is also 146mm wider.
Below you can see the front view size comparison of KEF KF92 and Dynaudio Sub 6 in scale.
Comparison image of KEF KF92 and Dynaudio Sub 6 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 KEF KF92 is approximately 1198.2cm2 / 185.7inch2 and base area of the Dynaudio Sub 6 is approximately 1488.2cm2 / 230.7inch2. The KF92 requires 19% less surface area than the Sub 6 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 KF92 weighs 20.05kg / 44.1lbs and the Dynaudio Sub 6 weighs 20.55kg / 45.2lbs. This makes the Sub 6 2% heavier than the KF92.
Here is a comparison of how KF92 and Sub 6'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 KF92?
Here are the items that are included inside the box of KF92:
- Powered subwoofer
- 6.5-feet AC power cord
- Speaker-level input block
- User Manual
- Important Safety Information
- Warranty Information
What's in the Box of Dynaudio Sub 6?
Here are the items that come with the Sub 6:
- Powered subwoofer
- 2 Grilles
- 6-feet AC power cord
- 4 Rubber feet (pre-installed)
- 4 Spike feet
- 4 Hex-nuts
- 4 Protective discs
- Wrench
- Owners Manual
- Quick Start Guide
- Warranty Extension Card
- Warning note
 Number of Woofers |
2
vs
1
|
More woofers |
| Low Frequency Response |
11 Hz
vs
16 Hz
|
Generates deeper bass |
 Base Surface Area |
1198cm2
vs
1488cm2
|
Takes less floor space |
 Price per pair* |
2000USD
vs
2399USD
|
costs less (*prices may change depending on the seller, location and time) |
| Woofer Size |
9.5 inches
vs
9 inches
|
Larger woofer |
 High Frequency Response |
230 Hz
vs
200 Hz
|
Generates higher frequency |
 Height |
334mm
vs
353mm
|
Easier to fit in smaller spaces |
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.
Dynaudio Sub 6 needs about 24% more floor area. KEF KF92 stands 50mm further into the room. KEF KF92 is 19mm taller.
| General |
KEF KF92 |
Dynaudio Sub 6 |
| Brand |
KEF |
Dynaudio |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Max Amplifier Output |
1000 watts |
500 watts |
| Frequency Response |
11-200 Hz |
16-230 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
1000-watt RMS |
500-watt RMS |
Drivers |
|
|
| Woofer Quantity |
2 |
1 |
| Woofer Size |
9" |
9.5" |
| Woofer Composition |
Hybrid aluminum |
Magnesium Silicate Polymer |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Firing Direction |
n/a |
side |
Physical Specs |
|
|
| Height |
353.0mm (13.9") |
334.0mm (13.1") |
| Width |
331.0mm (13") |
477.0mm (18.8") |
| Depth |
362.0mm (14.3") |
312.0mm (12.3") |
| Weight |
20.05kg (44.1lbs) |
20.55kg (45.2lbs) |
| Enclosure |
Acoustic Suspension |
Acoustic Suspension |
| Grille |
n/a |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
2 Years |
3 Years |
| Labor Warranty |
2 Years |
3 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 | A | 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 | KEF KF92 has the bigger amplifier - 1000W against 500W RMS, about 3dB more on tap. In a large room that is headroom before the DSP starts limiting. |
| Driver area | A | KEF KF92 moves more air: 2 x 9" against 9.5" is 1.8x the cone area, not the 1.34x 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 | A | 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. |
| Warranty | B | Dynaudio Sub 6 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 | A | KEF KF92 costs less - $2,000 against $2,399, about 17% less. |
A KEF KF92 B Dynaudio Sub 6
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?
KEF KF92 is the easier recommendation: it leads on most of the measured areas and costs less. Take Dynaudio Sub 6 if one of the "depends" rows describes your room. 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.
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.