In this review, we will be comparing In-wall Speakers and 255c-LS, two Passive In-wall speakers from Sonos and Polk Audio.
Let's have a brief look at the main features
of Sonos In-wall Speakers and Polk Audio 255c-LS first before getting into our more
detailed comparison.
Sonos In-wall Speakers Key Specs
- 2-way Design
- 1" Soft-Dome Tweeter
- 6.5" Polypropylene Woofer
- 44-20kHz Frequency Response
- 89 dB Sensitivity
- Impedance: 8ohms
- Power Range:up to 130watts
- Dimensions (H x W x D): 274.0" x 6.9375" x 3.6250"( 274.0 x 177.0 x 93.0mm )
Polk Audio 255c-LS Key Specs
- 2-way Design
- 1.0" Ring radiator Tweeter
- 2 x 5.25" Aerated polypropylene Woofer
- 44-29kHz Frequency Response
- 91 dB Sensitivity
- Impedance: 8ohms
- Power Range:10-150watts
- Weight:3.12kg
- Dimensions (H x W x D): 194.0" x 13.1250" x 0.0000"
What size room are the Sonos In-wall Speakers and Polk Audio 255c-LS 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* |
Sonos In-wall Speakers |
Polk Audio 255c-LS |
| 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 Sonos In-wall Speakers and Polk Audio 255c-LS 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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through my links. As an Amazon Associate I earn from qualifying purchases.
Drivers
Both In-wall Speakers and 255c-LS are 2-way speakers.
| Driver |
Sonos In-wall Speakers |
Polk Audio 255c-LS |
|
Driver Setup
|
2-way
|
2-way
|
|
Tweeter
|
1-inch
|
1.0-inch
|
|
Midrange
|
- |
- |
|
Woofer
|
1 x 6.5-inch
|
2 x 5.25-inch
|
In-wall Speakers features a 1" Soft-Dome Tweeter and 1 x 6.5" Polypropylene Woofer . On the other hand, the 255c-LS features a 1.0" Ring radiator Tweeter and 2 x 5.25" Aerated polypropylene Woofer .
Frequency Response
In-wall Speakers has a frequency range of 44-20kHz whereas 255c-LS has a frequency range of 44-29kHz.
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 In-wall class in our database.
Low Frequency
In-wall Speakers
High Frequency
In-wall 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
In-wall Speakers and 255c-LS have the same Impedance of 8 ohms but where they differ is the sensitivity levels. In-wall Speakers sensitivity is rated at 89 dB and the 255c-LS's is at 91 dB. This 2 dB difference makes the Polk Audio 255c-LS a more sensitive speaker compared to Sonos In-wall Speakers, hence will play louder with the same amount of watts.
Sensitivity
In-wall 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.
In-wall Speakers can handle a max power of 150 watts RMS from the amp the whereas In-wall Speakers has a max power handling value of 130 watts RMS , 20 watts less than the 255c-LS.
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
In-wall Speakers features Spring post type posts and 255c-LS has a Spring post type posts. None of these speakers feature bi-amping/bi-wiring.
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 Sonos In-wall Speakers's and Polk Audio 255c-LS's external dimensions. Sonos In-wall Speakers has external dimensions of 274.0 x 177.0 x 93.0mm ( 10.7500-inch x 6.9375-inch x 3.6250-inch) whereas Polk Audio 255c-LS has external dimensions of ( 7.6250-inch x 13.1250-inch x 0.0000-inch) .
Polk Audio 255c-LS is 80mm shorter and 93mm less deeper than Sonos In-wall Speakers but it is also 157mm wider.
What's in the Box of Sonos In-wall Speakers?
Here are the items that are included inside the box of In-wall Speakers:
2 In-wall loudspeakers2 Grilles2 Cutout Templates
What's in the Box of Polk Audio 255c-LS?
Here are the items that come with the 255c-LS:
In-wall loudspeakerWhite metal grilleMounting templateOwners Manual