Vanishing RT Series In Ceiling Three-Way Loudspeaker

  • 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-instal parcel
  • Timbre-matched to the RTiA Series

Surprisingly Big Sound

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.

Key Technologies


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.

  • Tech Specs
  • Support
Tech Specs


  • Total pieces


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

Despatch Cartons

  • Carton 1
    9.75" (24.77 cm) h x 11" (27.94 cm) w x 13" (33.02 cm) d - 8.5 lbs (3.86 kg)


  • Lifetime Warranty

In-Ceiling Speaker

  • Qty Included
  • Availability
    US   Internationally
  • Depth
    8.375" (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 Dimensions
    8.13" (20.65 cm) diameter

In-Ceiling Mount

  • Shape
  • Dimensions
    6.5" (16.51 cm) diameter


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

Audio Quality

  • Total Frequency Response
    34 Hz → 27,000 Hz
  • Nominal Impedance
    8 ohms
  • Sensitivity (1 watt @ 1 metre)
    90 dB
  • Lower and Upper -3dB Limits
    48 Hz → 25 Hz

External Amplifier

  • Recommended Amplifier Power Per Channel
    10 watts → 125 watts

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