Definitive Technology UIW RCS II

The UIW RCS II in-ceiling speaker produces phenomenally rich and immersive sound while it disappears above, virtually hidden in your ceiling. It’s technology that took decades to perfect, but will only take you milliseconds to appreciate.

  • Front-Row Audio Experience
  • Deep Bass, High Punch
  • Clear Dynamic Highs


1″ Aluminum Dome Tweeter

The RCSII aluminum dome tweeter delivers 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/Woofer

Most in-wall speakers lack the larger driver area of floorstanding speakers. The RCSII’s 5.25” 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 is superior midrange and bass performance, wrapped in a compact, stealthy package.


Passive Bass Radiators

Each RCSII includes twin 6.5” passive bass radiators. Passive radiators create more bass than comparably sized sealed or ported designs. The extra surface area moves more air, resulting in bigger and deeper low end that works beautifully on its own or mates seamlessly with subwoofers at a variety of crossover points.


Wave Launch™ Technology for a theater-like presentation

The RCSII’s Patented Wave Launch™ technology turns overhead speakers into engineering wonders, using precisely configured dual-angle baffles to create acoustics that make you believe you’re in front row center.


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 RCSII, you’ll hear loud, accurate, uncolored midrange and tight, powerful bass with no buzzing or sound leakage into walls and ceilings.

Total Frequency Response22 Hz → 30,000 Hz
Nominal Impedance Range8 ohms
Sensitivity (1W @ 1m)92dB
Included Accessories1x Wall Mounting Template
1x Paint Mask
1x Paintable Grille
1x Self Adhering Foam Gasket
Carton 1 ; Weight473.2 x 495.3 x 304.8mm (18.63″ x 19.5″ x 12″) ;
9.98kg (22 lbs)
Driver Complement1x 1″ (2.54 cm) d (Round) Tweeter – Tweeter
2x 5.25″ (13.34 cm) d (Round) Midrange – Tweeter
2x 6.5″ (16.51 cm) d (Round) Bass Radiator – Tweeter
Grille Dimensions (W x H)393.7 x 393.7mm (15.5″ x 15.5″)