Polk Audio 255C-RT is a 2-way Passive In-wall In-wall speaker by Polk Audio. It features a 1" Soft-Dome Tweeter and 2 x 5.25" Polymer Composite Woofer. The speaker has a frequency range of 50-25kHz and a sensitivity of 90 dB. Polk Audio 255C-RT has an MSRP of 398$ per pair.
Room Size Suitability
The size of the room where you plan to use the Polk Audio 255C-RT is a crucial factor in your decision. We have assessed its suitability for various room sizes based on its dimensions and maximum power output:
| Listening Environment* |
Suitability |
| Near-field | Poor |
| Small Room | Average |
| Mid-size Room | Good |
| Large Room | Average |
| Very Large Room | 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.)
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Frequency Response of the Polk Audio 255C-RT Speaker
Polk Audio 255C-RT has a Frequency response range of 50-25kHz at ±3dB and Power Range of 10-150 watts. With a minimum frequency of 50 Hz, 255C-RT delivers moderate bass depth so depending on your use case, you might want to consider adding a subwoofer to your system.
To focus on the subwoofers that are in a similar price range with Polk Audio 255C-RT, check out the Powered Subwoofers under $500. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how 255C-RT's Low and High frequency values compare with the average, max and min Low and High frequency values in its class.
Low Frequency
In-wall Speakers
High Frequency
In-wall Speakers
Impedance and Sensitivity
Polk Audio 255C-RT's nominal impedance level is
8 ohms and has a sensitivity of
90 dB.
Sensitivity
In-wall Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Polk Audio 255C-RT is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
90dB of the Polk Audio 255C-RT is an average sensitivity for stereo speaker so it is neither easy nor difficult to drive Sensitivity wise.
Check the amplifiers that are in a similar price range to the Polk Audio 255C-RT:
Input Type
255C-RT features Spring post type connectors. Bi-amping and Bi-wiring are not possible.
Polk Audio 255C-RT External Dimensions and Weight
Polk Audio 255C-RT has external dimensions of (Height x Width x Depth) 7.5625-inch x 13.0625-inch x 0.0000-inch.
Cabinet type and Materials
Polk Audio 255C-RT has a
In-wall type cabinet.
What's in the Box of Polk Audio 255C-RT?
Here are the items that are included inside the box of 255C-RT:
In-wall center-channel loudspeakerWhite metal grilleMounting templateOwners ManualSheer-Grille Painting instructionsOnline Registration CardPolk Audio product brochure
Recommended Accessories
Here is a list of accessories that we think you may need for the Polk Audio 255C-RT.
Warranty
Lifetime of parts warranty and Lifetime of labor warranty is generally provided by the manufacturer.