Polk Audio RC55i is a 2-way Passive In-wall In-wall speaker by Polk Audio. It features a 0.75" Hard-Dome Tweeter and 1 x 5.25" Polypropylene Woofer. The speaker has a frequency range of 70-20kHz and a sensitivity of 89 dB. Polk Audio RC55i has an MSRP of 129$ per pair.
Room Size Suitability
The size of the room where you plan to use the Polk Audio RC55i 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 | Average |
| Small Room | Good |
| Mid-size Room | Average |
| Large Room | Poor |
| Very Large Room | Bad |
(* 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.)
**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.
Frequency Response of the Polk Audio RC55i Speaker
Polk Audio RC55i has a Frequency response range of 70-20kHz at ±3dB and Power Range of 20-100 watts. With a minimum frequency of 70 Hz, it is hard to expect a strong bass response from RC55i so depending on your use case, using a subwoofer will significantly help to widen the response range.
To focus on the subwoofers that are in a similar price range with Polk Audio RC55i, check out the Powered Subwoofers under $300. Alternatively, find the Full list of Powered Subwoofers regardless of the price.
Here we have a comparison of how RC55i'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 RC55i's nominal impedance level is
8 ohms and has a sensitivity of
89 dB.
Sensitivity
In-wall Speakers
8 Ohms is pretty much the standard nominal impedance amongst stereo speakers and amplifiers so Polk Audio RC55i is not considered a difficult to drive speaker from nominal Impedance perspective.
Sensitivity
89dB of the Polk Audio RC55i 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 RC55i:
Input Type
RC55i features Spring clip type connectors. Bi-amping and Bi-wiring are not possible.
Polk Audio RC55i External Dimensions and Weight
Polk Audio RC55i has external dimensions of (Height x Width x Depth) 9.6250-inch x 6.1875-inch x 2.0120-inch (245.0 x 158.0 x 52.0mm ).
Base Surface Area
Base surface area of a loudspeaker may become a determining factor when the space in your room or desk is limited.
The base area of Polk Audio RC55i is approximately 82.2cm2 / 12.7inch2.
Cabinet type and Materials
Polk Audio RC55i has a
In-wall type cabinet.
What's in the Box of Polk Audio RC55i?
Here are the items that are included inside the box of RC55i:
2 White in-wall speakers2 White grilles1 Cardboard Mounting TemplateOwners ManualOnline registration sheetProduct Registration Card
Recommended Accessories
Here is a list of accessories that we think you may need for the Polk Audio RC55i.
Warranty
Lifetime of parts warranty and Lifetime of labor warranty is generally provided by the manufacturer.