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BKT 024 Wall/ceiling mounting bracket
BKT 024 Wall/ceiling mounting bracket

SoundPlus® T3 – Medium-Area Infrared Transmitter

IR Transmitters & Emitters, Medium-Area Solutions

IR T3

The SoundPlus® T3 continues Williams AV’s legacy of audio innovation. Featuring cutting-edge LED technology, it delivers a stronger, more consistent audio signal over a wider range than previous models, ensuring comprehensive coverage and minimizing dropouts.

The new LEDs offer increased power and efficiency, providing complete coverage of up to 32,000 sq ft (2,972 sq m), overcoming background noise, reverberations, and distance from the sound source. With its expanded coverage pattern and more robust audio signal, there’s no need for the additional cost of a secondary unit.

Engineered for AV professionals, the T3 offers a two-channel infrared transmitter with an integrated modulator and emitter. It operates on switchable carrier frequencies and includes optional Power-over-Ethernet (PoE) capability, allowing remote power delivery up to 100 feet, and remote RS-232 commands provide convenient control.

The T3’s compact form factor allows for discreet placement, ensuring it integrates seamlessly into any room’s aesthetics. It accommodates adjacent rooms without signal spillover, maintaining clear, high-quality audio within a single space. Ideal for environments requiring privacy or confidentiality, such as corporate boardrooms or spaces with sensitive information.

Design & Consultant Specs

System Includes

(1) IR T3 – Infrared Transmitter
(1) BKT 024 – Wall/Ceiling Mounting Bracket
(1) TFP 057 – International Power Supply with Line Cord

How It Works

The IR T3 can be controlled remotely via RS-232 commands. The commands include:

  • Powering the unit on/off
  • Remotely setting the IR frequency (2.3/2.8 or 3.3/3.8)
  • Muting the outgoing audio without powering off
  • Turning back panel LEDs on or off
  • Troubleshooting abilities

A full list of commands is available on the downloads tab in the Programmer’s Guide.

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

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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

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.