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Polk Audio 90-RT Vanishing 3-Way In-Ceiling Speaker (Each)

UPC: 747192120788


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Polk Audio 90-RT Vanishing 3-Way In-Ceiling Speaker (Each)

Big Sound from Speakers You Won't See, on a Budget

A big speaker that delivers big sound, yet vanishes into your room's decor. The 90-RT is perfect for use as stealth mains, rears and side surrounds in a high performance home theater, or for bringing dynamic sound to alternate zones from your main stereo listening room.

90-RT Features:

  • Vanishing Series built-in speakers feature our 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 d cor, Vanishing Series built-in speakers are virtually indistinguishable from their surroundings.
  • 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.
  • Vanishing Series RT speakers are timbre-matched to Polk RTi speakers to insure utterly seamless blending from speaker to speaker in systems that combine traditional and built-in speakers.
  • Dual band-pass bass ports are highly efficient in small enclosures, and smoothly funnels the angled woofer's low frequencies down around the driver array, eliminating "chuffing," so your small, practically invisible in-ceiling speakers achieve superior full-range blending and broad coverage with surprisingly deep bass.
  • 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.



Total Pieces


Included Accessories
(1) Polk s Wafer-thin Sheer Grille - White, Paintable

Optional Accessories
(1) PB LC60i - Pre-Construction Bracket - Sold Separate

Shipping Cartons

Carton 1
11.25" (28.58 cm) h x 13.25" (33.66 cm) w x 15.25" (38.74 cm) d - 9.5 lbs (4.31 kg)


Lifetime Warranty

In-Ceiling Speaker

Qty Included


9.28" (23.57 cm)

Driver Complement
(1) 3.25" (8.26 cm) d (Round) Dynamic Balance driver with mineral-filled polypropylene cone - Midrange
(1) 0.75" (1.91 cm) d (Round) Silk/polymer dome - Tweeter
(1) 9" (22.86 cm) d (Round) Dynamic Balance woofer with mineral-filled polypropylene cone - Subwoofer

Grille Dimensions
9.63" (24.46 cm) diameter

In-Ceiling Mount


8.19" (20.8 cm) diameter (cutout size)

Audio Quality

Total Frequency Response
30 Hz 27,000 Hz

Nominal Impedance
8 ohms

Sensitivity (1 watt @ 1 meter)
90 dB

Lower and Upper -3dB Limits
43 Hz 25,000 Hz

External Amplifier

Recommended Amplifier Power Per Channel
10 watts 125 watts


Audio Inputs

Speaker Inputs
(1) Pair of Push Connectors - Gold-Plated