Definitive Technology UIW RCS III 4.5" 2-Way Reference In-Ceiling Loudspeaker

The in-ceiling UIW RCS III reshapes sound waves to make you believe you’re sitting front row center. Patented Wave Launch technology turns overhead speakers into works of engineering wonder, using precisely configured dual angle baffles to create acoustics that surround you anywhere in the room. With speakers that produce so much sound from such a minimal space, your ears never had it so good.

  • Front row audio experiences come to life with patented Wave Launch technology
  • Breathtaking sound dynamics ring true with the pure aluminum dome tweeter
  • Minimal visibility and easy installation with six rotating dogleg clamps and hefty wood screws
  • Integrated wood enclosure creates greater audio performance with uncolored clarity

$599.00 $395.02

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Lower 48 U.S. States


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Driver Complement

Quantity 2
Diameter 1″ (2.54cm)
Type Pure Aluminum Dome
Mid / Woofer
Quantity 2
Diameter 4 1/2″ (11.43cm)
Type High Definition Bass/Midrange Driver
Bass Radiator
Quantity 2
Diameter 5 1/4″ (13.34cm)
Type Planar Bass Radiator


Audio Inputs
Speaker Level 1 Pair (Heavy Duty Spring Loaded)
Maximum Sensitivity
1 watt @ 1 Meter 92 dB
Total Frequency Response
Overall 30 Hz – 30 kHz
Nominal Impedance
Compatible with 8 ohm
A/V Receiver Crossover Setting Small (60 Hz)
Power Handling 10 – 250 watts per channel


Cut Out Dimensions
Height 10 3/8″ (26.35cm)
Width 10 3/8″ (26.35cm)
Mounting Depth 5 7/8″ (14.92cm)
Grille Dimensions
Height 11 1/2″ (29.21cm)
Width 11 1/2″ (29.21cm)
Outer Flange
Height 11 1/2″ (29.21cm)
Width 11 1/2″ (29.21cm)
Orientation In Ceiling
Cabinet Type
Speaker Enclosure Sealed Medite
Product Weight
Out of Box 13 lbs

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