Sound Associates, Inc. Since 1946

Audio Consulting Design and Installation

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R4 - Audio, Video Receiver

R4 front view | R4 side view
The R4 wireless video display is a state-of-the-art device that supplies verbatim closed captions, subtitling, graphics or audio playback on an individual hand-held receiver. Originally designed for live theatrical productions, this fully-automated system displays dialogue, lyrics and sound effects with the efficiency of real-time captioning at a fraction of the cost and manpower. Each R4 receiver is a self-contained, non-intrusive wireless unit that can be used in any seat in theater, allowing a special needs patron to become an active member of the general audience, no longer relegated to certain performances or special seating constraints.

The R4 when coupled with the T4 transmitter and the CS-3 control unit will display I-Caption slides of closed captions or subtitling. The R4 can also play back prerecorded audio files in mp3 format for audio description for the blind or multi-lingual audio commentary. The R4 is a completely automated receiver utilizing proprietary wireless technology to deliver reliable cue changes every time.

The R4 handheld unit incorporates a sensitive RF transceiver utilizing a peer-to-peer protocol in 2.4 GHz range for operation in global markets. This innovative mesh protocol offers added network stability through self-healing, self-discovery, and dense network operation. All of the video and audio content are stored on the units’ removable micro-SD card. The unit plays mono or stereo mp3 audio files and displays graphic data in JPEG format.


  • High resolution color TFT LCD display supplies crisp graphics and text that is easy see at all angles.
  • 3.5” LCD display allows a comfortable amount of dialogue on the screen at one time.
  • Backlight can be ramped on or down from 0% to 100% over a specified period of time for each individual slide allowing the natural transition from dark to light.
  • Each unit has been ergonomically designed to fit comfortably in the parton’s hand with little or no long – term fatigue.
  • The R4 is completely self-contained, battery powered and receives show information via an innovative 2.4 GHz mesh network specifically designed to work in high traffic radio transmission areas.
  • Completely automated delivery of audio and video segments when coupled with the I-Caption CS-3 control unit.
  • Rechargeable 3000mAh lithium-ion battery supplies extended usage.
  • Easy file transfer to R4 hand held units via mini USB cable or micro-SD card.
  • Last five slides stored in buffer memory so end user can back up if they missed information.
  • Live Text function allows user to broadcast data to all units in real time.

Documents and References

Specifications Sheet
Operation Manual
Price List