In this review, we will be comparing R3 and M106, two Passive Bookshelf speakers from KEF and Revel. Let's have a brief look at the main features
of KEF R3 and Revel M106 first before getting into our more
detailed comparison.
What size room are the KEF R3 and Revel M106 speakers good for?
The size of the room in which you are planning to use these loudspeakers is an important decision factor. Here we have compared their suitability to various sizes of environments considering their size and max power parameters:
In the following sections, we will get into more detail in order to better understand how the KEF R3 and Revel M106 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
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Drivers
One of the fundamental differences between these two speakers is that R3 is a 3-way design whereas the M106 is a 2-way speaker. 3-way designs utilize a midrange driver in addition to the tweeter and woofer on 2-way designs. Designing a crossover for a 3-way speaker is a complicated process and generally increases the overall cost of the speaker.
| Driver |
KEF R3 |
Revel M106 |
|
Driver Setup
|
3-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
1 x 5-inch |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 6.5-inch
|
R3 features a 1" aluminum Dome Tweeter , a 5" Midrange and 1 x 6.5" Hybrid aluminum Woofer with a Crossover frequency at 400Hz and 2900Hz. On the other hand, the M106 features a 1" aluminum Hard-Dome with Acoustic Lens Waveguide Tweeter and 1 x 6.5" Aluminum Woofer with a Crossover frequency at 2300Hz.
Frequency Response
R3 has a frequency range of 52-28k Hz whereas M106 has a frequency range of 59Hz- 20kHz. With a minimum frequency of 52Hz, the R3 can go significantly deeper on the low side and provide stronger bass compared to the M106's min frequency of 59Hz.
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 Bookshelf class in our database.
Low Frequency
Bookshelf Speakers
High Frequency
Bookshelf Speakers
None of these speakers achieves full range experience which is commonly agreed as 20Hz-20kHz. In order to achieve lower lows / deeper bass, we recommend you pair these with a subwoofer. Visit our Powered Subwoofers section to find out more about the available options.
Impedance and Sensitivity
R3 and M106 have the same Impedance of 8 ohms and their sensitivity is also same at 87 dB.
Sensitivity
Bookshelf Speakers
Power Range
Power
range is the range of input power in watts RMS that a loudspeaker is designed to handle. While using an amplifier within this range ensures the nominal performance , inputting a power that is higher than the max wattage can result in a damaged speaker.
R3 can handle a max power of 180 watts RMS from the amp the whereas M106 has a max power handling value of 150 watts RMS, 30 watts less than the R3.
Keep in mind that a higher max power handling value doesn't necessarily make that a louder speaker
compared to a lower max handling speaker. Loudness or the sound level is also impacted by parameters
such as Impedance, sensitivity and system efficiencies.
Input Type and Bi-Amping / Bi-Wiring
R3 features Binding post posts which make bi-amping or bi-wiring possible. M106 has a Binding post which doesn't feature bi-amping/bi-wiring.
Revel M106's Binding post terminals
Cabinet Type and Port Position
Both R3 and M106 have rear firing ports. Rear ported speakers generally need more room between the backside of the speaker and the wall compared to sealed and front/bottom ported speakers. Placing the speakers too close to the walls may cause the bass to sound boomy.
If you are limited in space and can't get the speakers away from the backwall, check our Speakers with Front Firing Ports page.
KEF R3 Port
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 KEF R3's and Revel M106's external dimensions. KEF R3 has external dimensions of 423.0 x 199.0 x 337.0mm ( 16-5/8 x 7-13/16 x 13-1/4inch) whereas Revel M106 has external dimensions of 383.0 x 210.0 x 280.0mm ( 15-1/16 x 8-1/4 x 11inch) .
Revel M106 is 40mm shorter and 57mm less deeper than KEF R3 but it is also 11mm wider.
Below you can see the front view size comparison of KEF R3 and Revel M106 in scale.
Comparison image of KEF R3 and Revel M106 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 R3 is approximately 670.6cm2 / 103.9inch2 and base area of the Revel M106 is approximately 588.0cm2 / 91.1inch2. The R3 requires 14% more surface area than the M106 which gives it a small disadvantage on placement in tight spaces.
Here is an another comparison that shows both speakers on a BDI Octave Media Cabinet, next to a standard size amplifier and turntable in scale:
Size Comparison image of KEF R3 and Revel M106 on a Media Console
Weight Comparison The weight of a loudspeaker can become an important factor if you need to move and reposition the unit often. Weight of a speaker can also "sometimes" be an indicator of the rigidity of the enclosure and the quality of the internal components used. The KEF R3 weighs 13.55kg / 29.8lbs and the Revel M106 weighs 8.41kg / 18.5lbs. This makes the R3 61% heavier than the M106.
Here is a comparison of how R3 and M106's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of KEF R3?
Here are the items that are included inside the box of R3:
2 Bookshelf loudspeakers2 Grilles2 Foam port plugs8 Self-adhesive rubber feetUser ManualWarranty Information
What's in the Box of Revel M106?
Here are the items that come with the M106:
Bookshelf loudspeakerGrilleFoam port plugOwners Manual
 Max Input Power |
180 watts
vs
150 watts
|
Handle more power from your amplifier |
 Driver Setup |
3-way
vs
2-way
|
Have a dedicated mid-range driver |
 Low Frequency Response |
52 Hz
vs
59 Hz
|
Generates deeper bass |
 High Frequency Response |
28k Hz
vs
20k Hz
|
Generates higher frequency |
 Bi-Amping and Bi-Wiring |
Yes
vs
No
|
Allows bi-amping and bi-wiring connections |
 Height |
383mm
vs
423mm
|
Easier to fit in smaller spaces |
 Base Surface Area |
588cm2 (210x280mm)
vs
670cm2 (199x337mm)
|
Takes less floor space |
| General |
KEF R3 |
Revel Performa3 M106 |
| Brand |
KEF |
Revel |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
15-180 watts |
50-150 watts |
| Sensitivity |
87 dB |
87 dB |
| Impedance |
8 ohms |
8 ohms |
| Impedance |
3.2 ohms |
n/a |
| Frequency Response |
52-28k Hz |
59Hz- 20kHz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Hybrid aluminum |
Aluminum |
| Woofer Surround Material |
Rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Dome |
Hard-Dome with Acoustic Lens Waveguide |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
5" |
No |
| Crossover Frequency |
400Hz and 2900Hz |
2300Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
423.0mm (16.7") |
383.0mm (15.1") |
| Width |
199.0mm (7.8") |
210.0mm (8.3") |
| Depth |
337.0mm (13.3") |
280.0mm (11") |
| Weight |
13.55kg (29.8lbs) |
8.41kg (18.5lbs) |
| Enclosure |
Bass Reflex |
Bass Reflex |
| Finish |
MDF/Lacquer |
Wood/Lacquer |
| Available Colors |
Black Gloss, White Gloss, Walnut |
Gloss Walnut,Piano Black |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
n/a |
24-25" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
Yes |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |