In this review, we will be comparing S20 and M126Be, two Passive Bookshelf speakers from Polk Audio and Revel.
Let's have a brief look at the main features
of Polk S20 and Revel M126Be first before getting into our more
detailed comparison.
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 )
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 )
What size room are the Polk S20 and Revel M126Be 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* |
Polk S20 |
Revel M126Be |
| 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 Polk S20 and Revel M126Be 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 S20 and M126Be are 2-way speakers.
| Driver |
Polk S20 |
Revel M126Be |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
1 x 6.5-inch
|
S20 features a 1" Terylene Soft-Dome Tweeter and 1 x 6.5" Mica-reinforced polypropylene Woofer with a Crossover frequency at 2500Hz. On the other hand, the M126Be features a 1" beryllium Hard-Dome Tweeter and 1 x 6.5" DCC Aluminum Woofer .
Frequency Response
S20 has a frequency range of 39-40k Hz whereas M126Be has a frequency range of 54-44k 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
S20 and M126Be have the same Impedance of 8 ohms but where they differ is the sensitivity levels. S20 sensitivity is rated at 88 dB and the M126Be's is at 86 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.
S20 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
S20 features Binding post type posts and M126Be has a Binding post type posts. None of these speakers feature bi-amping/bi-wiring.
Cabinet Type and Port Position
Both S20 and M126Be 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 Polk S20's and Revel M126Be's external dimensions. Polk S20 has external dimensions of 376.0 x 216.0 x 350.0mm ( 14.8 x 8.5 x 13.7inch) whereas 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) .
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 Polk S20 is approximately 756.0cm2 / 117.2inch2 and base area of the Revel M126Be is approximately 555.4cm2 / 86.1inch2. The S20 requires 36% more surface area than the M126Be which gives it a small disadvantage 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 Polk S20 weighs 7.73kg / 17lbs and the Revel M126Be weighs 10.00kg / 22lbs. This makes the M126Be 29% heavier than the S20.
Here is a comparison of how S20 and M126Be's weights compare with the average, max and min weights in Passive Bookshelf class.
Weight
All Bookshelf Speakers
What's in the Box of Polk S20?
Here are the items that are included inside the box of S20:
2 Bookshelf loudspeakers2 Grilles (attached)8 Self-adhesive rubber feetOwners ManualOnline Product Registration
What's in the Box of Revel M126Be?
Here are the items that come with the M126Be:
Bookshelf loudspeakerGrilleFoam port plugOwners Manual
 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 |
 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 |
| General |
Polk Audio Signature S20 |
Revel PerformaBe M126Be |
| Brand |
Polk Audio |
Revel |
| Speaker Type |
Bookshelf speakers |
Bookshelf speakers |
| Power Range |
20-125 watts |
50-150 watts |
| Sensitivity |
88 dB |
86 dB |
| Impedance |
8 ohms |
8 ohms |
| Frequency Response |
39-40k Hz |
54-44k Hz |
Drivers |
|
|
| Woofer Quantity |
1 |
1 |
| Woofer Size |
6.5" |
6.5" |
| Woofer Composition |
Mica-reinforced polypropylene |
DCC Aluminum |
| Woofer Surround Material |
Butyl rubber |
Rubber |
| Tweeter Size |
1" |
1" |
| Tweeter Type |
Soft-Dome |
Hard-Dome |
| Aimable Tweeter |
No |
No |
| Midrange Driver |
No |
No |
| Crossover Frequency |
2500Hz |
n/a |
| Firing Direction |
rear |
rear |
Physical Specs |
|
|
| Height |
376.0mm (14.8") |
388.0mm (15.3") |
| Width |
216.0mm (8.5") |
212.0mm (8.3") |
| Depth |
350.0mm (13.8") |
262.0mm (10.3") |
| Weight |
7.73kg (17lbs) |
10.00kg (22lbs) |
| Enclosure |
Bass Reflex |
Bass reflex |
| Finish |
Meddite MDF |
Wood/Lacquer |
| Available Colors |
Black, Walnut, Brown Walnut |
Walnut,Black,White,Silver |
| Mounting Bracket |
No |
No |
| Recommended Stand Height |
24-28" |
22-26" |
| 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 |