Two-channel infrared audio system with T3 transmitter and Stethoset receivers, providing coverage up to 19,000 sq ft (1,765 m²).

Designed for assistive listening and environments where signal spillover into adjacent rooms needs to be prevented. Includes five lightweight, hands-free Stethoset receivers with a five-bay charging station, wall/ceiling mounting bracket, and ADA wall plaque.

System Includes

• 1 × IR T3 – Medium-Area Infrared Transmitter
• 5 × IR RX20 – Two-Channel Stethoset Infrared Receivers
• 1 × CHG 520 – Charger
• 1 × BKT 024 – Wall/Ceiling Mount
• 1 × IDP 008 – ADA Wall Plaque
• 1 × TFP 057 – Power Supply

IR T3 Transmitter

• Dimensions: 9.0″ W (229 mm) × 3.8″ D (97 mm) × 1.4″ H (36 mm)
• Weight: 0.84 lb (0.38 kg)
• Color: Black
• Power Supply: TFP 057 desktop-style internationally 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, 0.2 A, center positive
• Power Indicator: Green LED
• Sleep/Power Save Mode: Shuts off IR when no audio is 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 m²) in single-channel mode with the RX22-4 receiver; up to 19,000 sq. ft (1,774 m²) 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 kΩ series resistor)
• Audio Inputs: Phoenix-style connector jack for Ch. A and Ch. B; accepts line-level balanced or unbalanced audio
• Audio Indicators: One yellow LED per channel; lights and stays on steadily with minimum audio level
• Signal-to-Noise Ratio: 70 dB (line input)
• Frequency Response: 95 Hz–17.6 kHz, −3 dB re 1 kHz (line inputs); 125 Hz–17.0 kHz, −3 dB re 1 kHz (microphone input)
• Operating Requirements: 32–122 °F (0–50 °C)
• Mounting Kit: BKT 024 omnidirectional wall/ceiling mount
• Compatible Receivers: WIR RX22-4, IR RX20
• Warranty: 2-year warranty against component failure and manufacturing defects
• Approvals / Regulatory Compliance: CE, FCC, Industry Canada, WEEE, RoHS, CB Scheme, RCM, PSE