Definitive Technology UIW RSS III

Specially designed for use in custom home theaters of the highest quality, UIW RSS III speakers deliver spacious surround sound while remaining practically invisible in your wall or ceiling.

Featuring two aluminum dome tweeters, a pair of 3.5” cast-basket drivers and two 3.5” pressure-coupled Low Bass Radiators, the UIW RSS III produces a uniquely immersive experience that completely envelops listeners in an expansive, 360-degree soundstage.

  • Naturalistic Surround Sound
  • Pristine Highs
  • For Ceilings or Walls


Bipolar Technology for a theater-like presentation

Employing Definitive Technology’s fabled Bipolar driver architecture, UIW RSS Bipolar in-wall/ in-ceiling loudspeakers fill the room with a perfect combination of direct and reflected sound for stunning surround effects.


Dual 1” Pure Aluminum Tweeters

The RSSIII aluminum dome tweeters deliver a clear, precise high frequency response. Their ultralight, rigid construction enables them to play significantly higher frequencies than we can hear, providing effortless, distortion-free highs within and beyond the audible range.


Dynamic Midrange/Woofers

Most in-wall speakers lack the larger driver area of floorstanding speakers. The RSSIII’s 3.5” midrange/woofer drivers match butyl rubber surrounds with rigid polypropylene cones in cast baskets to provide a much greater cone excursion than other comparably-sized drivers. The result issuperior midrange and midbass performance, wrapped in a compact, stealthy package.


Passive Bass Radiators

Each RLSIII includes twin 3.5” passive radiators. Passive radiators create more bass than comparably sized sealed or ported designs. The extra surface area moves more air, resulting in more dynamic midbass that works beautifully on its own or mates seamlessly with subwoofers at a variety of crossover points.


Rotating Arrays for optimal directivity

When RSS III Bipolar speakers are installed in the ceiling, the driver arrays can be rotated 90° to optimize performance for your listening area.


Fully Enclosed for powerful sound where you want it

UIW Reference Series loudspeakers are fully enclosed and sealed with dense, acoustically inert, anti-resonant, anti-vibration Medite® wood. With the RSSIII, you’ll hear loud, accurate, uncolored midrange and tight, powerful bass with no buzzing or sound leakage into walls and ceilings.

Included Accessories1x Wall Mounting Template
1x Paint Mask
1x Paintable Grille
1x Self Adhering Foam Gasket
Carton 1 (W x H x D) ; Weight342.9 x 342.9 x 184.2mm (13.5″ x 13.5″ x 7.25″) ;
4.08kg (9 lbs)
In-Wall Speaker
Qty Included1
Grille Dimensions (W x H)239.8 x 279.4mm (9.44″ x 11″)
Dimensions (W x H)211.1 x 251mm (8.31″ x 9.88″)
Audio Inputs
Speaker Inputs1x Pair of Heavy Duty, Spring Loaded
Total Frequency Response40Hz → 30,000Hz
Nominal Impedance Range8 ohms → 4ohms
Max Sensitivity (1W @ 1m)92dB
A/V Receiver Crossover SettingsSmall (120Hz)
Recommended Amplifier Power Per Channel10 W → 300 W