Williams AV IR SYS33-00 – Infrared Assistive Listening System (Stethoset)
Williams AV IR SYS33-00 – Infrared Assistive Listening System (Stethoset) is backordered and will ship as soon as it is back in stock.
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Williams AV IR SYS33-00 – Infrared Assistive Listening System (Stet...
Product Overview
The Williams AV IR SYS33-00 is a medium-area infrared assistive listening system packaged with stethoset (under-the-chin) receivers for public venues. Built on the SoundPlus T3 infrared transmitter, it is a room-contained infrared assistive listening system suited to auditoriums, courtrooms, and government spaces. Infrared keeps the audio inside the room, providing privacy that RF and Wi-Fi cannot.
Product Description
The IR SYS33-00 is configured with five IR RX20 two-channel stethoset receivers, making it a strong fit for venues that prefer sanitary, easy-to-issue under-the-chin listeners. The package includes the IR T3 medium-area infrared transmitter, a charger, a wall/ceiling mount, an ADA wall plaque, and a power supply. The transmitter broadcasts on up to two channels (2.3/2.8 or 3.3/3.8 MHz) for dual-language interpretation or a single assistive feed, with contained coverage up to 32,000 ft2 single-channel when emitters are placed for line-of-sight. Power over Ethernet and a universal 48 VDC supply provide flexible installation, and RS-232 control allows integration with third-party AV control systems. Stethoset receivers simplify distribution and cleaning in high-traffic public spaces. Additional IR RX20 receivers can be added as needed.
Key Features
- Stethoset receivers — Five IR RX20 under-the-chin listeners for sanitary, quick distribution.
- Room-contained privacy — Infrared does not pass through walls.
- ADA-ready — Includes an ADA wall plaque and mounting hardware.
- Two-channel operation — Dual-language interpretation or a single assistive feed.
- PoE-ready — Power over Ethernet plus universal 48 VDC supply.
- Large coverage — Up to 32,000 ft2 single-channel with proper emitter placement.
- Control integration — RS-232 for third-party AV control.
Typical Applications
- Auditorium and multi-purpose room assistive listening
- Courtrooms and government spaces requiring contained audio
- House of worship assistive listening
- Commercial meeting spaces and training rooms
Technical Specifications
| Technology | Infrared (line-of-sight, room-contained) |
| Transmitter | IR T3 medium-area, 2.3/2.8 or 3.3/3.8 MHz |
| Included receivers | 5 x IR RX20 (2-channel stethoset) |
| Coverage | Up to 32,000 ft2 (single-channel) |
| Includes | Charger, wall/ceiling mount, ADA plaque, power supply |
| Power | 48 VDC universal supply; optional PoE |
| Warranty | 2-year parts and labor |
Full specifications: Williams AV SoundPlus T3 stethoset system spec sheet.
Frequently Asked Questions
What are stethoset receivers?
Under-the-chin listeners that are easy to issue and sanitize — popular in high-traffic public venues.
Why infrared for this room?
Infrared is room-contained, providing privacy for courtrooms and government meetings.
How is the transmitter powered?
Via the 48 VDC universal supply or optional Power over Ethernet.
Is it ADA-ready?
Yes, the package includes an ADA wall plaque and mounting hardware.
Can it integrate with a control system?
Yes, through RS-232 monitoring and control.
What warranty applies?
Two-year parts and labor; Creation Networks supports design and integration.
At Creartion Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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