In this review, we will be comparing R15s and KF92, two Powered Subwoofer speakers from Perlisten 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 Perlisten R15s 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.
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Drivers
The efficiency of a subwoofer is directly proportional to the total radiating are squared hence the woofer quantity and diameter.Perlisten R15s and KEF KF92 have a totally different setup: the Perlisten R15s features x -inch drivers whereas the KF92 features 2 x 9-inch drivers.
Frequency Response
R15s has a frequency range of 20-388 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 R15s'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 Perlisten R15s has a Bass Reflex type cabinet. 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. On the other hand the KEF KF92 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
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 Perlisten R15s's and KEF KF92's external dimensions. Perlisten R15s has external dimensions of () whereas KEF KF92 has external dimensions of 353.0 x 331.0 x 362.0mm (13-7/8 x 13 x 14-1/4inch).
KEF KF92 is clearly the larger of the two speakers. Its body is 331mm wider, 353mm taller and 362mm deeper than Perlisten R15s.
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 Perlisten R15s weighs 78.10kg / 171.8lbs and the KEF KF92 weighs 20.05kg / 44.1lbs. This makes the R15s 290% heavier than the KF92.
Here is a comparison of how R15s and KF92's weights compare with the average, max and min weights in Powered Subwoofer class.
Weight
All Subwoofer Speakers
 High Frequency Response |
388k Hz
vs
200k Hz
|
Generates higher frequency |
 Height |
0mm
vs
353mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
0cm2
vs
1198cm2
|
Takes less floor space |
 Woofer Size |
9 inches
vs
inches
|
Larger woofer |
| Low Frequency Response |
11 Hz
vs
20 Hz
|
Generates deeper bass |
 Price per pair* |
2000USD
vs
4495USD
|
costs less (*prices may change depending on the seller, location and time) |
| General |
Perlisten R15s |
KEF KF92 |
| Brand |
Perlisten |
KEF |
| Speaker Type |
Powered Subwoofer |
Powered Subwoofer |
| Sensitivity |
92 dB |
n/a |
| Frequency Response |
20-388 Hz |
11-200 Hz |
Amplifier |
|
|
| Watts RMS (Continuous) |
n/a |
1000-watt RMS |
Drivers |
|
|
| Woofer Quantity |
|
2 |
| Woofer Size |
" |
9" |
| Woofer Composition |
|
Hybrid aluminum |
| Tweeter Size |
- |
- |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
Physical Specs |
|
|
| Height |
mm (0") |
353.0mm (13.9") |
| Width |
mm (0") |
331.0mm (13") |
| Depth |
mm (0") |
362.0mm (14.3") |
| Weight |
78.10kg (171.8lbs) |
20.05kg (44.1lbs) |
| Enclosure |
Bass Reflex |
Acoustic Suspension |
| Grille |
Yes |
n/a |
| Moisture Resistancy |
No |
No |
Connections |
|
|
Other |
|
|
| Parts Warranty |
|
2 Years |
| Labor Warranty |
|
2 Years |