Polk Audio 900-LS

Features
Connections
Mounting Options
Dimensions

Features

Vanishing Series In-ceiling Speakers: The Polk Audio Vanishing Series in-ceiling 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 ceiling, the Polk Audio Vanishing Series in-ceiling loudspeakers offer a one-cut, drop-in installation and rotating cam stabilizing system. The Vanishing LS series in-ceiling 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.

Cassini-Oval Woofer: This Polk Audio Vanishing Series 900-LS in-ceiling surround loudspeaker employs a rear-mounted 6" x 9" Dynamic Balance mineral-filled polypropylene Cassini-Oval cone woofer, with rubber surround, for a smooth, consistent frequency response. The oval woofer is mounted at an angle in the enclosure, behind the midrange and tweeter, and ported out the front.

3-1/4" Midrange: The 900-LS has a 3-1/4" Dynamic Balance aerated polypropylene cone midrange. The aerated polypropylene cone is 20% lighter than conventional polypropylene, and 35% lighter than aluminum, to give you clear midrange and high efficiency. Polk Audio's patented Dynamic Balance technology eliminates unwanted resonances.

Ring Radiator Tweeter: The 900-LS employs a 3/4" Dynamic Balance ring radiator tweeter for detailed highs and superb imaging.

Wall Distance Toggle Switch: If you mount your in-ceiling loudspeakers closer than 2 feet from a side wall, the proximity of the surface can elevate the midbass response between 50 and 200Hz, causing a boomy sound. To compensate, the 900-LS is equipped with the Vanishing Wall Distance Toggle switch, located on the front panel. The filter adjusts the crossover to flatten the response, and tune out the boominess, without sacrificing the deep bass response of the speaker. The switch is labeled "Wall Dist." with two positions: in (<2') and out (>2')."

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 "Room" with two positions: out (normal) and in (reflective).

Frequency Response: The overall frequency response of the in-ceiling loudspeaker is 28Hz to 33kHz, and the -3dB frequency response is 40 to 29kHz.

Sheer-Grille: The 900-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 diameter is 9-5/8.

Connections

Gold-Plated Spring-Loaded Posts: The in-ceiling 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.

Mounting Options

Applications: The Polk Audio Vanishing Series 900-LS in-ceiling loudspeaker is designed to be used as part of a hidden two-channel stereo pair or in a 5.1- or 7.1-channel home theater configuration. At only 9-5/8" in diameter, the speaker makes a minimal visual impact.

Note: The speaker isn't recommended for installation in high-moisture locations.

Security Eyebolt: The speaker has an eyebolt attached to the speaker magnet. This eyebolt is designed to be used as an extra measure of installation security. The majority of the speaker weight should be supported from behind by attaching a wire or hook to the eyebolt and to the ceiling joists.

Rotating Cam System: The Polk Audio in-ceiling loudspeakers utilize a rotating cam system to ensure a secure, vibration-free installation. Each 900-LS has 4 rotating cams to hold the speaker in place. The cams can be tightened from the front panel with a Phillips-head screwdriver.

Installation: The 900-LS can be installed in new or existing construction:

• Existing Construction: In existing ceilings, 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 (4 rotating cams).
• New Construction: The optional PB LC60i pre-construction brackets should be used for new-build or open-wall retro-fitting.

Dimensions