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Polk 255c-LS In-Wall Centre Speaker

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A Stealth Center Channel Speaker

Vanishing LS Series In-Wall Center Channel Speaker.

With the Polk Vanishing Series in-wall centre channel speaker, you have the centrepiece of a world-class stealth home theatre. All you see is the screen, and all you hear is crystal clear dialogue, dynamic detail and directional effects. The Vanishing Series centre channel speaker anchors the action without attracting attention. It's the state-of-the-art in today's most-wanted interior design plans.

Key Features:
- 2-way design
- Enhanced, reengineered ring radiator tweeter
- Dual Dynamic Balance polypropylene bass/mid woofers
- Powerport technology for more efficient, deep bass
- High-performance audio with a design built for a flush fit with your wall
- Wafer-thin Sheer-Grille is discreet and sonically-transparent
- Timbre-matched to LSiM series speakers

Ring Radiator Tweeter

Enhanced, reengineered ring radiator tweeter extends top-end response for incredible details and realistic imaging.

Reflective surfaces in rooms can make sound brighter and cause image distortion. Engaging the Vanishing reflective room compensation feature (by selecting the low setting) lowers the tweeter level to compensate for reflective surfaces. Vanishing reflective room compensation is a custom audio control that cuts the level only in the 4-5kHz range, exactly where reflectivity destroys sound quality. Outside this narrow 1kHz band, the tweeter retains its detailed and accurate high-frequency response, for no loss of realistic musical details.

Dynamic Balance® Drivers

Patented Polk Audio technology and construction techniques produce powerful, deep bass performance, especially when you need it most.


PowerPort® bass venting is Polk's patented design for smoothly transitioning the airflow from the port into your listening area, eliminating turbulence and distortion, for bigger, more efficient, deep bass impact.

Distance Toggle

If positioning limitations demand that your loudspeakers are installed closer than 2 feet from side walls, the proximity of the surface can result in a response bump between 50 and 200Hz. This can create a boomy sound. The Vanishing wall distance toggle switch is a custom audio control that adjusts the crossover to flatten response and tune out boominess, without sacrificing deep bass response, for more lifelike sound and more flexible placement.


Vanishing Series built-in speakers feature Polk's exclusive wafer-thin Sheer-Grille, a magnetically-secured grille that protrudes only 7mm from its surroundings. Sheer-Grilles have nearly transparent, ultra-small perfs, and are acoustically inert, for dynamic, unimpeded sound and more uniform coverage, even in larger rooms.

Painted to match your décor, Vanishing Series built-in speakers are virtually indistinguishable from their surroundings.


Vanishing LS Series

Vanishing Series LS speakers are timbre-matched to Polk LSi speakers to insure utterly seamless blending from speaker to speaker in systems that combine traditional and built-in speakers.

Easy Installation

Easy one-cut, drop-in installation puts built-in audio within reach, with Perfect Fit templates, a precision flange, and (available) pre-construction brackets; achieve secure, vibration-free efficiency with a simple turn of the patented Rotating Cam system.

More Information
Model Number 255CLS
RRP 799.00

Shape: Rectangle
Driver Enclosure Type: PowerPort Bass Vented

2x 5.25" Dynamic Balance aerated polypropylene cones with rubber surrounds
1x 1" Dynamic Balance ring radiator tweeter

Total Frequency Response: 30 Hz → 33kHz
Frequency Response (-3dB): 44 Hz → 29kHz
Nominal Impedance: 8 ohms
Sensitivity: 91dB (1 watt @ 1 meter)
Recommended Amplifier Power: 10 watts → 150 watts
Speaker Inputs: Pair of Gold-Plated Push Connectors

Grille Dimensions (W x H):
350.8 x 236.5 mm

Speaker Dimensions (In-Wall) (W x H x D)
333.5 x 193.8 x 187.5 mm

Speaker Weight: 3.11 kg

Included Accessories:
- Wall Mounting Template
- Polk’s Wafer-thin Sheer Grille™ - White, Paintable

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3 Years
These Polk installation speakers include a 3 Year Australian warranty.

If you experience any issues with this product please don't hesitate to contact us.
How much does delivery cost?
Nothing! We offer free post on all orders to anywhere within the Australian mainland and Tasmania.

Can I pick up my purchase from your store?
Yes. You can usually pick up your order from one of our stores. We recommend that you contact us first to ensure your order is ready for collection.

What happens if I'm not happy with my product when it arrives?
We offer a 30 day 100% satisfaction guarantee on all of our products! If your order arrives damaged, faulty or not quite as you expected, please contact us and we will do everything we can to fix the situation.

Please visit our FAQ page for answers to other frequently asked questions or contact us if you have any other questions or comments.