In this review, we will be comparing M126Be and S20, two Passive Bookshelf speakers from Revel and Polk Audio.
Let's have a brief look at the main features
of Revel M126Be and Polk S20 first before getting into our more
detailed comparison.
Revel M126Be Key Specs
- 2-way Design
- 1" Hard-Dome Tweeter
- 6.5" DCC Aluminum Woofer
- 54-44k Hz Frequency Response
- 86 dB Sensitivity
- Impedance: 8ohms
- Power Range:50-150watts
- Weight:10.00kg
- Dimensions (H x W x D): 388.0" x 8-5/16" x 10-5/16"( 388.0 x 212.0 x 262.0mm )
Polk S20 Key Specs
- 2-way Design
- 1" Soft-Dome Tweeter
- 6.5" Mica-reinforced polypropylene Woofer
- 39-40k Hz Frequency Response
- 88 dB Sensitivity
- Impedance: 8ohms
- Power Range:20-125watts
- Weight:7.73kg
- Dimensions (H x W x D): 376.0" x 8.5" x 13.7"( 376.0 x 216.0 x 350.0mm )
What size room are the Revel M126Be and Polk S20 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:
| Listening Environment* |
Revel M126Be |
Polk S20 |
| Near-field |
Poor |
Poor |
| Small Room |
Average |
Average |
| Mid-size Room |
Good |
Good |
| Large Room |
Average |
Average |
| Very Large Room |
Poor |
Poor |
(* Approximate Room sizes: Small < 100sq. ft / 9 m2,
Mid-size: 100-220 sq. ft / 9-20 m2, Large 220-400 sq. ft / 20-36 m2, Very Large: >
400 sq. ft / 36 m2.
Average Floor Height: 9" / 2.7m. Typical room sizes differ from country to country, and the actual
listening experience changes depending on floor height, room shape, surface materials, listening
position, speaker locations, etc.)
In the following sections, we will get into more detail in order to better understand how the Revel M126Be and Polk S20 compare and hopefully end up with enough arguments to decide which one of these loudspeakers is the better choice for you.
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking
through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both M126Be and S20 are 2-way speakers.
| Driver |
Revel M126Be |
Polk S20 |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 6.5-inch
|
M126Be features a 1" beryllium Hard-Dome Tweeter and 1 x 6.5" DCC Aluminum Woofer . On the other hand, the S20 features a 1" Terylene Soft-Dome Tweeter and 1 x 6.5" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz.
Frequency Response
M126Be has a frequency range of 54-44k Hz whereas S20 has a frequency range of 39-40k Hz. With a minimum frequency of 39Hz, the S20 can go significantly deeper on the low side and provide stronger bass compared to the M126Be's min frequency of 54Hz.
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
M126Be and S20 have the same Impedance of 8 ohms but where they differ is the sensitivity levels. M126Be sensitivity is rated at 86 dB and the S20's is at 88 dB. This 2 dB difference makes the Polk S20 a more sensitive speaker compared to Revel M126Be, hence will play louder with the same amount of watts.
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.
M126Be can handle a max power of 150 watts RMS from the amp the whereas S20 has a max power handling value of 125 watts RMS, 25 watts less than the M126Be.
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
M126Be features 5-way post type posts and S20 has a 5-way post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both M126Be and S20 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.
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 Revel M126Be's and Polk S20's external dimensions. Revel M126Be has external dimensions of 388.0 x 212.0 x 262.0mm ( 15-1/4 x 8-5/16 x 10-5/16inch) whereas Polk S20 has external dimensions of 376.0 x 216.0 x 350.0mm ( 14.8 x 8.5 x 13.7inch) .
Revel M126Be is 4mm narrower and 88mm less deeper than Polk S20 but it is also 12mm 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 Revel M126Be is approximately 555.4cm2 / 86.1inch2 and base area of the Polk S20 is approximately 756.0cm2 / 117.2inch2. The M126Be requires 27% less surface area than the S20 which gives it a small advantage on placement in tight spaces.
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 Revel M126Be weighs 10.00kg / 22lbs and the Polk S20 weighs 7.73kg / 17lbs. This makes the M126Be 29% heavier than the S20.
Here is a comparison of how M126Be and S20's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Revel M126Be?
Here are the items that are included inside the box of M126Be:
Bookshelf loudspeakerGrilleFoam port plugOwners Manual
What's in the Box of Polk S20?
Here are the items that come with the S20:
2 Bookshelf loudspeakers2 Grilles (attached)8 Self-adhesive rubber feetOwners ManualOnline Product Registration
 Max Input Power |
150 watts
vs
125 watts
|
Handle more power from your amplifier |
 High Frequency Response |
44k Hz
vs
40k Hz
|
Generates higher frequency |
 Base Surface Area |
555cm2
vs
756cm2
|
Takes less floor space |
 Sensitivity |
88 dB
vs
86 dB
|
Play louder with same amount of amplification power |
 Low Frequency Response |
39 Hz
vs
54 Hz
|
Generates deeper bass |
 Height |
376mm
vs
388mm
|
Easier to fit in smaller spaces |
| General |
Revel PerformaBe M126Be |
Polk Audio Signature S20 |
| Brand |
Revel |
Polk Audio |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
50-150 watts |
20-125 watts |
| Sensitivity |
86 dB |
88 dB |
| Impedance |
8 ohms |
8 ohms |
| Frequency Response |
54-44k Hz |
39-40k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
DCC Aluminum |
Mica-reinforced polypropylene |
| Woofer Surround Material |
Rubber |
Butyl rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Hard-Dome |
Soft-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
n/a |
2500Hz |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
388.0mm (15.3") |
376.0mm (14.8") |
| Width |
212.0mm (8.3") |
216.0mm (8.5") |
| Depth |
262.0mm (10.3") |
350.0mm (13.8") |
| Weight |
10.00kg (22lbs) |
7.73kg (17lbs) |
| Enclosure |
Bass reflex |
Bass Reflex |
| Finish |
Wood/Lacquer |
Meddite MDF |
| Available Colors |
Walnut,Black,White,Silver |
Black, Walnut, Brown Walnut |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
22-26" |
24-28" |
| Grille |
Yes |
Yes |
| Moisture Resistancy |
No |
No |
Connections |
|
|
| Biamp Inputs |
No |
No |
Other |
|
|
| Parts Warranty |
5 Years |
5 Years |
| Labor Warranty |
5 Years |
5 Years |