Williams Sound WIR TX75 Pro Infrared Transmitter (3.3/3.8 MHz)

Williams Sound WIR TX75 Pro Infrared Transmitter (3.3/3.8 MHz)

Williams Sound WIR TX75 Pro Infrared Transmitter (3.3/3.8 MHz)

B&H # WIRTX75D MFR # WIR TX75 D
Important Notice: This item is non-cancelable and non-returnable
Special Order
Expected availability: 7-10 business days 
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Not eligible for Free Expedited Shipping

Product Highlights

  • Phoenix Connector Audio Inputs
  • Smart Power Saving Saves Up to 80% Power
  • Extend Range With TX-S Slave Emitters
  • Digital Communication Bus
  • Signal and Power over Cat-5 Cable
  • Dual or Single Channel With Double Power
  • Headset, Stethoset, Body-Packs Available
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  • 1Description
The 3.3/3.8MHz version of the WIR TX75 Pro Infrared Transmitter provides secure and clear communication in your conference room, courtroom, classroom, or other mid-sized venue with a coverage area of up to 5,000 square feet in single channel mode when using the RX22-4 receiver. Two slave transmitters (WIR TX75-S) can be added to the system to expand the total coverage area to 15,000 square feet when mounted 100' from the master transmitter. Audio inputs are provided for each channel on dedicated Phoenix connectors that accept balanced or unbalanced line level signal in either stereo or mono configurations. A 3.5 mm stereo microphone jack is also available with a rotary gain adjustment knob that is compatible with electret microphones. If the unit senses that only one channel is in use, it will double the output power on that channel to provide twice the coverage.

Power and signal can be carried to the slave emitters by a single CAT-5 cable. An intelligent power-saving feature automatically disables power to the IR diodes, reducing power consumption by 80% when no audio is present. A robust communication bus between the master and slave unit reduces interference, and a set of troubleshooting lights on the master unit helps simplify installations. It is designed to work with a headset, stethoset, and body-pack receivers (which are sold separately). The transmitter comes with a mounting bracket as well as an international power supply.
In the Box
Williams Sound WIR TX75 Pro Infrared Transmitter (3.3/3.8 MHz)
  • Mounting Kit
  • International Power Supply
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description
    Audio I/O Line inputs: Phoenix Contact connectors for Ch1 and Ch2 accept line level, balanced or unbalanced audio
    Microphone Input 3.5 mm, stereo jack with signal and bias connected to tip, electret microphone compatible (4 VDC bias supply with 2.7 Kohms series resistor)
    Coverage Master Only
    5,000 sq. ft in single-channel mode with the RX22-4 receiver (464 sq. m)
    3,000 sq. ft in single-channel mode with the RX15-2 receiver (279 sq. m)
    2,000 sq. ft in single-channel mode with the RX18 receiver (186 sq. m)
    Slave Mode 2x 8p8c RJ45 connectors output 48 VDC 0.4 A power, baseband RF and a bi-directional RS-485 bus for control and status communications
    Emitter IR Power 0.7 W
    Carrier Frequency Ch 1:3.3 MHz
    Ch 2: 3.8 MHz
    Modulation FM Wideband, ±50 kHz deviation max, 50 μS pre-emphasis
    Sleep Mode Shuts off carrier when no audio is present for 3 minutes
    Indicators Green LED for power
    Yellow LED blinks at nominal audio level. One per channel.
    2-position switch turns on/off indicator lights
    Green: Power/Unit Status
    Yellow: Transmit/Cable Status
    DC Power Input 2.5 mm ID barrel connector, 48 VDC, 0.4 A center positive
    Signal-to-Noise Ratio Line input: 70 dB
    Frequency Response Line inputs: 95 to 17,600 Hz, -3dB re 1,000 Hz
    Microphone Input: 125 Hz to 17,000 Hz, -3dB re 1,0000 Hz
    Total Harmonic Distortion <1% (1 kHz, nominal deviation, line or microphone input)
    Operating Temperature 32 to 122°F (0 to 50°C)
    Approvals CE, C-tick, FCC, Industry Canada, WEEE, RoHS, CB Scheme
    Compatible Receivers WIR RX22-4, WIR RX18, WIR RX15-2
    Power Supply Desktop style international power supply with IEC line cord, 100-240 VAC input, 50-60 Hz, 24 W; 48 VDC output
    Dimensions (W x D x H) Without Faceplate: 10 x 3.1 x 1.5" (25.4 x 7.9 x 3.8 cm)
    With Faceplate: 10 x 3.1 x 2.5" (25.4 x 7.9 x 6.4 cm)
    Weight 0.6 lb (0.3 kg)
    Packaging Info
    Package Weight 2.0 lb
    Box Dimensions (LxWxH) 10.75 x 7.25 x 7.0"

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