SoundPlus T3® Infrared System with Headphones

IR SYS32

Renowned for delivering crystal-clear audio and exceptional speech intelligibility, the SoundPlus® T3 infrared transmitter is the latest innovation from Williams AV. Equipped with advanced LED technology, the two-channel T3 transmitter delivers stronger, more efficient audio signals, ensuring comprehensive coverage and minimizing dropouts. The enhanced LEDs provide greater power and efficiency, offering complete coverage of up to 32,000 sq ft (2,972 sq m), effectively overcoming background noise, reverberation, and distance from the sound source.

This system includes everything needed to create an ADA-compliant assistive listening environment. Handheld receivers pick up the infrared signal, transmitting audio through lightweight folding headphones or a mono neckloop, which connects directly to T-coil hearing aids or cochlear implants. The transmitter comes with an omnidirectional wall or ceiling mounting bracket for discreet installation.

A “Hearing Assistance Available” wall plaque is also included to signal ADA-compliant accessibility. Ideal for environments requiring privacy or confidentiality, such as corporate boardrooms or spaces where sensitive information is shared.
(Note: Part number IR SYS30-04 for the Australian market includes 2 neckloops)

System Includes

(1) IR T3 Medium-area Infrared Transmitter
(3) WIR RX22-4 Four-channel Infrared Receivers
(3) HED 021 Mono Folding Headphones
(2) NKL 001 18″ Mono Neckloops (Note: Part number IR SYS30-04 for the Australian market includes 2 neckloops)
(3) BAT 001-2 AA Alkaline Batteries
(1) BKT 024 Wall/Ceiling Mount
(1) IDP 008 ADA wall plaque
(1) TFP 057 Power Supply

IR T3 architectural and engineering specifications

Architectural/Consultant Specs The Infrared Transmitter shall consist of an all-in-one modulator and emitter operating on 2.3 MHz and/or 2.8 MHz (or 3.3 and/or 3.8 MHz). The carrier frequency shall use 50 kHz deviation and 50 µS pre-emphasis. The transmitter will operate in 2-channel mode on 2.3 and 2.8 or on 3.3 and 3.8 MHz. The transmitter will operate in single-channel mode on 2.3, 2.8, 3.3, or 3.8 MHz. The transmitter shall have coverage up to 32,000 ft2 (2,972 m2) with the WIR RX22-4 infrared receiver in single-channel mode or 19,000 ft2. (1,765 m2) with the RX20 infrared receiver in single-channel mode. The transmitter shall be housed in a heavy-duty black plastic enclosure with a metal plate base and a durable infrared transparent front lens. It shall be convection-cooled without fans and have a sleep/power save mode that shuts off the IR when no audio is present for 12 minutes.The Transmitter shall have a signal-to-noise ratio of 70 dB or better and have an audio frequency response of 95 Hz to 17.6Hz, -3 dB re 1 kHz (line inputs), and 125 Hz to 17.0 kHz, -3 dB re 1 kHz (microphone input). The Transmitter includes an omnidirectional mounting bracket for various permanent installations. Each channel shall have a line-level Phoenix-style connector input, and each channel shall have an audio input-level LED.There shall be a single 3.5 mm microphone input with gain control, and the mic input shall have a channel selector switch. The transmitter shall have a switch to turn off all indicator LEDs if pressed and held and change the carrier frequency set if pressed and held. The transmitter shall be powered by a 48 VDC universal power supply, 50-60 Hz, 100-240 VAC input, 18 W with optional Power over Ethernet (PoE) support. The transmitter shall have RS-232 monitoring and control available for third-party controllers.The transmitter shall be covered by a two-year parts and labor warranty and 90 days on accessories. The Williams AV SoundPlus T3® infrared transmitter is specified.

IR T3

Dimensions:

9.0" W (229 mm) x 3.8" D (97 mm) x 1.4" H (36 mm)

Weight:

0.84 lb. (0.38 kg)

Color:

Black

Power Supply:

TFP 057 Desktop style international certified power supply with IEC line cord, 100-240 VAC input, 50-60 Hz, 18 W; 48 VDC output

DC Power Input:

2.1 mm ID barrel connector, 48 VDC, 0.2A, center positive

Power Indicator:

Green LED

Sleep/Power Save Mode:

Shuts off IR when no audio present for 12 minutes

Modulation:

FM Wideband, ±50 kHz deviation max, 50 μS pre-emphasis

Baseband Frequencies:

2.3, 2.8, 3.3, 3.8 MHz

Coverage Area:

Up to 32,000 sq. ft (2,972 sq. m) in single-channel mode with the RX22-4 receiver Up to 19,000 sq. ft (1,774 sq. m) with the RX20 stethoset receiver

Microphone gain adjust: Rotary 10 dB range
Microphone channel switch: Selects microphone input to Ch. A or Ch. B
Microphone input: 3.5 mm, stereo jack with signal and bias connected to tip, electret microphone compatible (6 VDC bias supply with 2.7 k ohm series resistor)

Audio Inputs:

Line inputs: Phoenix style connector jack for Ch A and Ch B accept line level, balanced or unbalanced audio

Audio Indicators:

One yellow LED per channel. Lights up and stay on steady with minimum audio level.

Signal-to-Noise Ratio:

70 dB (line input)

Frequency Response:

95 Hz to 17.6 kHz, -3 dB re 1 kHz (line inputs) 125 Hz to 17.0 KHz, -3 dB re 1 kHz (microphone input)

Operating Requirements:

32°-122°F (0-50°C)

Mounting Kit:

Wall or Ceiling mount: BKT 024 Omnidirectional mount

Compatible Receivers:

WIR RX22-4, IR RX20

Warranty:

2-year warranty against component failure and manufacturing defects. See Full Warranty statement on the website for details.

Approvals/Regulatory Compliance:

CE, FCC, Industry Canada, WEEE, RoHS, CB Scheme, RCM, PSE

 

Warranty

2 Years

No Videos Are Available

No Firmware Found

Infrared audio is ideal for assistive listening for ADA/Disability compliance, language interpretation, and audio description in environments requiring privacy and confidentiality or where audio signals must remain in a space without spillover to adjacent spaces. Frequently used in:

  • Medical centers and treatment rooms
  • Courtrooms, jury deliberation rooms, and city council chambers
  • Classrooms and lecture halls
  • Auditoriums and theaters
  • Conference rooms, corporate boardrooms, and training centers

Design & Consultant Specs