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Polk Audio® White In-Ceiling Loudspeaker

Model #: 70-RT
Polk Audio
At a Glance

The Vanishing® Series 70-RT features a unique 3-way driver array that produces big, full-range performance from a deceptively small in-ceiling speaker.

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$99,999.00Save $NaN

Get to know this product.

  • Broad coverage and dynamic, full-range performance from an extra deep well design with a Cassini oval woofer
  • Painted to match your décor, Vanishing Series built-in speakers blend in perfectly with their surroundings
  • Innovative features and patented Polk Audio technology in a discrete, easy-to-install package
  • Timbre-matched to the RTiA Series


The unique, wafer-thin grille is magnetically secured to deliver nearly transparent, ultra-small perfs and dynamic, unimpeded sound.

Power Port®

Patented bass venting design smoothly transitions air flow, eliminating turbulence and distortion, for deeper, more efficient bass impact.


Compatible with Polk Audio RTi speakers for seamless blending between traditional and built-in speaker systems.

Reflective Room Compensation

Lower tweeter levels offset reflective surfaces, cutting the level in the exact 4-5kHz band where reflectivity destroys sound quality.

Dual Band-Pass Bass Ports

Smooth funneling for low frequencies around the driver array eliminates “chuffing” for full-range blending, broad coverage and deep bass.

Simple Setup

Perfect Fit templates, a precision flange, (available) pre-construction brackets and the patented Rotating Cam system ensure secure, vibration-free installation.

Useful Documents


Connector Type:Gold Plated Pair of Heavy Duty Spring Loaded


Tweeter Composition:Polymer Dome
Midrange Size:2.5"
Midrange Composition:Polypropylene




Sold As:Each


Sensitivity:90 dB
Speaker Type:In-Ceiling Speaker




Total Pieces1


Included Accessories(1) Polk’s Wafer-thin Sheer Grille™ - White, Paintable
Optional Accessories(1) PB 50 - Pre-Construction Bracket - Sold Separate

Shipping Cartons

Carton 19.75" (24.77 cm) h x 11" (27.94 cm) w x 13" (33.02 cm) d - 8.5 lbs (3.86 kg)


Lifetime WarrantyYes

In-Ceiling Speaker

Quantity Included1
AvailabilityUS; Internationally
Depth8.375" (21.27 cm)
Driver Complement(1) 0.75" (1.91 cm) d (Round) Silk/Polymer Tweeter - Tweeter; (1) 2.5" (6.35 cm) d (Round) Dynamic Balance Driver with Mineral-Filled Polypropylene Cone - Midrange; (1) 7" (17.78 cm) d (Round) Dynamic Balance Sub with Mineral-Filled Polypropylene Cone - Subwoofer
Grille Dimensions8.13" (20.65 cm) diameter

In-Ceiling Mount

Dimensions6.5" (16.51 cm) diameter


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

Audio Quality

Total Frequency Response34 Hz → 27,000 Hz
Nominal Impedance8 ohms
Sensitivity (1 watt @ 1 meter)90 dB
Lower and Upper -3dB Limits48 Hz → 25 Hz

External Amplifier

Recommended Amplifier Power Per Channel10 watts → 125 watts

Misc. Specs

Product Weight7.6
Enclosure MaterialPolypropylene
Frequency Response34Hz - 27kHz
Outdoor ApprovedNo
Manufacturer WarrantyLimited Lifetime
Input Power Range10-125 Watts
Bi Amp InputsNo
Speaker Connector TypeSpring Clips
RMS Power Handling (Watts)125
Enclosure TypeBass Reflex
Impedance8 ohms
Maximum Power Handling (Watts)125
Bass CompositionMineral-Filled Polypropylene Cone
Bass Size (in.)7 in.
Depth (in.)8.38
Height (in.)8.13
Width (in.)8.13
Woofer Size7
WarningProposition 65 Warning for California Residents