High-Quality In-Wall Center Channel Speaker with 5.25" Drivers

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Vanishing LS Series In-Wall Center Channel Speaker

  • Dual 5.25" Dynamic Balance® polypropylene woofers
  • 1" Ring Radiator tweeter
  • Paintable Wafer-thin Sheer Grille™
  • Perfect for Dolby Atmos, DTS:X, Auro 3D, and IMAX Enhanced
  • Timbre matched to Legend, Reserve & LSiM Series

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Key Technologies

  • Polk’s patented Power Port design provides greater surface area and smoother air flow for more output and less distortion compared to conventional ported speakers.
  • Proudly engineered and designed in Baltimore, Maryland, Polk products are crafted to meet high standards of quality, performance, and reliability, ensuring a premium audio experience that is the pinnacle of American Hi-Fi.
  • Polk’s exclusive lightweight Dynamic Balance® Polypropylene Cones deliver spectacular midrange clarity, punchy bass and high efficiency.

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Details & Specifications


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Does this model have aimable tweeters? The in-wall mount location is above my screen, which puts it well above the listener's head. If this does not allow aiming tweeters, what model(s) do?

Asked by: EhrenZoner
Hello, This 255c-LS does feature an aimable tweeter, this is done by pushing on the outer ring of the tweeter to swivel it, it can move up to 15 degrees. The V60 Slim (https://www.polkaudio.com/en-us/product/built-in-speakers/in-ceiling/v60-slim/113394.html) does have a swivel mount tweeter as well that can be aimed towards the listening position. Both would be ideal for the situation you are encountering. For more information, you can also give our customer care team a call at 800-377-7655 (Product Support) Mon - Sun: 9AM - 9PM EST or email us through https://www.polkaudio.com/en-us/contact-us.html
Answered by: Polk Audio
Date published: 2024-03-10

What cubic feet of volume is needed if these were to be put into an enclosure?

Asked by: Rich P
Hello, our in-wall/in-ceiling speakers are designed to operate free air or infinite baffle. If back box enclosures must be used; the recommended sealed enclosure volume is 1.2 cubic feet. This does include driver displacement. Installing 1/2 to 3/4 of a pound of Dacron is also recommended to dampen the enclosure. We recommend using 1/2 inch MDF for the building material.
Answered by: Polk Audio
Date published: 2024-03-10

My mounting options are limited due to a brick facia and low profile requirement. The dimensions of this unit fit the bill. Is it possible to build these into a sealed enclosure? If so, what is the recommended air space for this speaker?

Asked by: R Crooks
Hello, Usually these speakers work best with open air behind them but in the case that you want to build a sealed enclosure, we can recommend that you leave about 2-3 inches of space around the speaker. There is also a switch on the speaker itself for EQ that you may try to test the options to see what sounds best within the enclosure.
Answered by: Polk Audio
Date published: 2023-11-16

I purchased the Polk Legend L600 Floor Speakers.  Do you recommend pairing these speakers with in-wall center channel or rear surround speakers? If so, which speakers model?

Asked by: Polk legend fan
To best match the excellent L600 speakers using an in-the-wall center channel speaker, the 255C-LS is the best choice. My first choice for in-the-wall surround speakers is the 265-LS speakers. If free-standing speakers are possible, I recommend the L400 center channel and the L100 Bookshelf speakers as surround speakers.
Answered by: Polk Audio
Date published: 2023-05-08
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