Vanishing Series In-Wall Speakers: The Polk Audio
Vanishing Series in-wall loudspeakers feature a
precision-engineered, minimally flanged design and Polk's exclusive Sheer-Grille,
which protrudes only 7mm from its surroundings. Installing virtually flush in
your wall, the Polk Audio Vanishing Series in-wall loudspeakers
offer a one-cut, drop-in installation and rotating cam stabilizing system. The
Vanishing LS series in-wall speakers are timbre-matched to Polk Audio's flagship
LSi and LSiM series loudspeakers for seamless blending from speaker to speaker when
you're building a speaker system.
Dual Midranges: This Polk Audio Vanishing Series 255c-LS in-wall center-channel
loudspeaker employs two 5-1/4" Dynamic Balance aerated polypropylene
cone midrange drivers with rubber surrounds for a smooth, consistent frequency
response. The aerated polypropylene cones are 20% lighter than conventional
polypropylene, and 35% lighter than aluminum, to give you clear midrange, punchy
bass, and high efficiency. Polk Audio's patented Dynamic Balance technology
eliminates unwanted resonances.
Ring Radiator Tweeter: The 255c-LS employs a 1" Dynamic Balance
ring radiator tweeter for
detailed highs and superb imaging. This high-performance tweeter features a 15° swivel housing, for
more direct high frequency control, excellent off-axis imaging and more
Reflective Room Compensation Control: The
Reflective Room Compensation Switch, conveniently located on the front panel, allows you to digitally compensate for harsh reflective
surfaces, such as smooth walls, glass windows, and hardwood floors. The filter doesn't merely reduce high frequencies, it
simply cuts the level only in the 4-5kHz range where room acoustics
most often interfere with performance. The switch is labeled "Tweeter" with two
positions: out (normal) and in (filter).
Frequency Response: The overall frequency response of the
in-wall center-channel loudspeaker is 30Hz to 33kHz, and the -3dB frequency
response is 44 to 29kHz.
Sheer-Grille: The 255c-LS features Polk Audio's exclusive wafer-thin Sheer-Grille, a
magnetically-secured metal grille that protrudes only 7mm from its surroundings. The Sheer-Grille can be painted to match your décor, making it virtually
indistinguishable from its surroundings. The Sheer-Grille has nearly
transparent, ultra-small perforations, and is acoustically inert, for dynamic,
unimpeded sound and more uniform coverage, even in larger rooms. The grille's
dimensions are 14-3/4" x 9-1/4".
Gold-Plated Spring-Loaded Posts: The in-wall center-channel
loudspeaker has a gold-plated pair of spring-loaded binding posts that can
accept up to 12-gauge wire, single- or dual-banana plugs, or pin connectors.
Applications: You can use the Polk Audio Vanishing Series
center-channel loudspeaker to complete a system of traditional loudspeakers or
in-wall speakers, by adding an inconspicuous center-channel speaker.
Note: The speaker isn't recommended for installation in
Placement: The in-wall center-channel speaker is designed to be
installed above or below your flat-panel television. It should be installed as close to ear level as possible. If the speaker
needs to be installed lower or higher than ear level, you should aim the tweeter
Note: Do not block the in-wall center-channel speaker with your TV
or furniture, as this will disrupt and muffle the sound.
Rotating Cam System: The Polk Audio in-wall center-channel loudspeaker
utilizes a rotating cam system to ensure a secure, vibration-free installation.
The 255c-LS has 6 rotating cams to hold the speaker in place. The cams can be
tightened from the front panel with a Phillips-head screwdriver.
Installation: The 255c-LS can be installed in new or
- Existing Construction: In existing walls, use the included
cardboard template for one-cut, drop-in simplicity. Achieve secure,
vibration-free efficiency with a simple turn of Polk's Rotating Cam system
(6 rotating cams).
- New Construction: The optional
PB LCic pre-construction brackets should be used for new-build or open-wall retro-fitting.
|Overall Dimensions (with grille)
||Width = 14-3/4"
Height = 9-1/4"
||Width = 13-1/8"
Height = 7-5/8"
|Mounting Depth (behind 1/2"
||Depth = 3.75"