NEW commercial-grade; medium-area infrared

Ideal Use Cases

The Williams AV SoundPlus T2 is a commercial-grade, medium-area infrared transmitter intended for assistive listening and language interpretation systems. Its sleek, compact footprint measures 9.0 inches wide by 3.8 inches deep by 1.4 inches high, and the black enclosure weighs 0.84 lb. The transmitter supports installations using either the WIR RX22-4 or IR RX20 receiver. Coverage depends on the selected receiver: up to 18,000 sq. ft. in single-channel mode with the RX22-4, or up to 11,500 sq. ft. with the RX20. These documented coverage figures help match the transmitter and receiver combination to the intended listening area.

Why Choose This Model

The IR T2 supports four baseband frequencies: 2.3, 2.8, 3.3, and 3.8 MHz. Separate Phoenix-style line-input connections for Channels A and B accept balanced or unbalanced line-level audio. A 3.5 mm stereo microphone jack supports compatible electret microphones and supplies 6 VDC bias through a 2.7 k ohm series resistor. The microphone input includes a rotary gain adjustment with a 10 dB range, plus a channel switch that assigns the microphone to Channel A or Channel B. One yellow audio LED per channel illuminates steadily when the minimum audio level is present, while a green LED provides power status.

Installation and Integration

The specified BKT 024 omnidirectional mount supports wall or ceiling installation. The compact chassis can therefore be positioned according to the planned infrared coverage area without requiring a large equipment footprint. Power is supplied through a 2.1 mm ID, center-positive barrel connector requiring 48 VDC at 0.2A. The specified TFP 057 desktop-style, internationally certified power supply uses an IEC line cord, accepts 100-240 VAC at 50-60 Hz, is rated at 18 W, and provides 48 VDC output. The transmitter is specified for operation from 32°F to 122°F, or 0°C to 50°C. Integration options include balanced or unbalanced line sources on both channels and an electret-compatible microphone input that can be assigned to either channel.

Performance Highlights

The IR T2 uses FM wideband modulation with a maximum deviation of ±50 kHz and 50 μS pre-emphasis. Its line input provides a specified signal-to-noise ratio of 70 dB. Frequency response is 95 Hz to 17.6 kHz at -3 dB relative to 1 kHz through the line inputs, while the microphone input is rated from 125 Hz to 17.0 kHz under the same reference condition. Receiver selection directly affects the documented coverage area, with the RX22-4 supporting the higher stated maximum in single-channel mode. When audio is absent for 12 minutes, the sleep and power-save function shuts off infrared transmission automatically.

What Makes It Different

The defining combination is a compact 0.84 lb. enclosure, receiver-dependent coverage up to 18,000 sq. ft., four selectable baseband frequencies, and dedicated input provisions for two line channels and one electret-compatible microphone. The channel-specific yellow audio indicators provide an immediate view of audio presence, and the microphone controls place gain adjustment and channel assignment directly on the transmitter. Its automatic infrared shutdown addresses periods without audio, while the wall-or-ceiling mounting specification provides two documented installation orientations. Regulatory approvals and compliance listings include CE, FCC, Industry Canada, WEEE, RoHS, CB Scheme, RCM, and PSE.

Final Assessment

The Williams AV SoundPlus T2 is a focused transmitter for commercial medium-area assistive listening and language interpretation applications. It combines flexible balanced or unbalanced line connectivity, an electret-compatible microphone input, four baseband frequencies, receiver-specific coverage ratings, and automatic power-saving operation in a compact black enclosure. System planning should account for the chosen RX22-4 or RX20 receiver, the corresponding coverage figure, and the specified BKT 024 wall or ceiling mount. The product carries a five-year warranty against component failure and manufacturing defects, subject to the full warranty statement.