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Williams Sound WIR SYS 75P PRO IR Listening System

Williams Sound WIR SYS 75P PRO IR Listening System
Williams Sound WIR SYS 75P PRO IR Listening System
Williams Sound WIR SYS 75P PRO IR Listening System
Williams Sound WIR SYS 75P PRO IR Listening System
Williams Sound WIR SYS 75P PRO IR Listening System

Williams Sound WIR SYS 75P PRO IR Listening System

Item #100929
(0 Reviews)
USD$1,404.00 Request Price Match

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Williams Sound WIR SYS 75P PRO IR Listening System

This portable 2-channel IR system meets ADA compliance for jury deliberation rooms. Phoenix Contact® audio input connectors on the WIR TX-75 Infrared Transmitter.

System includes:

  • (1) WIR TX-75c 2-Channel infrared transmitter with Phoenix Contact® jack inputs (2.3/2.8 MHz)
  • (2) WIR RX22-4 four-channel selectable, infrared receivers
  • (2) EAR 022 surround earphones
  • (2) NKL 001 neckloops
  • (2) BAT 001-2 AA Alkaline Batteries
  • (1) MIC 049 table top conference microphone
  • (1) WCA 007 WC 12ft cable
  • (1) IDP 008 ADA wall plaque
  • (1) CCS 030 large carry case
  • (1) table-top tripod


  • Meets ADA compliance for jury deliberations rooms.
  • Complete system with carry case.
  • Portable, quick, easy set-up.
  • Up to 12,000 sq ft coverage when used with RX 22-4 Receiver
  • Up to (2) TX75-S slave emitters available for extended coverage up to 36,000 sq ft. total.
  • Master unit has troubleshooting lights built in.
  • Separate Phoenix Contact® jackaudio input connectors for each channel (2.3/2.8MHz) accept balanced or unbalanced line-level inputs, use together for stereo operation or seperately for mono.
  • Unit senses if ony one channel is in use and doubles the output power on that channel for twice the coverage.
  • Power-Saving: if no audio is present after a few minutes, unit automatically disables power to IR diodes, reducing power consumption by 80 percent.
  • Looks great! Sleek, professional styling complements room aesthetics.


EAR 022 Surround Earphones:

  • Receiver Style: Body-Pack, dual-lens detector, lanyard
  • Size: 4.1" L x 2.85" W x 1.2" H (104.1 mm x 72.4 mm x 30.4 mm)
  • Weight: 4.5 oz (127 g) with batteries
  • Color and Material: Black
  • Lanyard: 3 ft (0.91 m), allows receiver to be worn around the neck
  • Operating Temperature: -10° C to +50° C
  • Battery Type: 2 x AA, alkaline (BAT 001-2) or NiMH (BAT 026-2)
  • Battery Life: Alkaline: 60 hours, NiMH: 30 hours/charge
  • Battery Drain: 25 mA, nominal
  • Charging Contacts: For use only with CHG 3512
  • Carrier Frequency: Channel 1: 2.3 MHz, Channel 2: 2.8 MHz Channel 3: 3.3 MHz, Channel 4: 3.8 MHz
  • De-Emphasis: 50 uS
  • FM Deviation: ±50 kHz
  • Signal-to-Noise Ratio: 60 dB min.
  • Squelch: Receiver squelches (mutes) at 40 dB S/N ratio
  • Frequency Response: 25 Hz to 16 KHz, +1 dB, -3 dB, electrical response
  • Total Harmonic Distortion: Less than 1%, electrical response
  • Controls: ON/OFF/VOLUME: combination thumbwheel knob Channel Selector: four-position rotary switch
  • Indicators: Red LED ͞ON" indicator, flashes to indicate Low battery
  • Audio Output Jacks: 3.5 mm stereo mini phone jack Accepts 3.5 mm mono or stereo phone plug
  • Audio Output Power: 15 mW max at 32 Ω
  • Acoustic Output: 125 dB SSPL90 with HED 021; 110 dB SSPL90 w/ EAR 013
  • Sensitivity: Better than 1 nW/cm2 for 40 dB signal-to-noise ratio
  • Approvals: CE, FCC, RoHS, WEEE
  • Warranty: 5 years on receiver, 90 days on accessories
  • Compatible Headphones/Earphones: Mono or stereo, 8-32 ohms, 3.5 mm mini phone plug, HED 021, HED 026, EAR 013, EAR 014, EAR 022, NKL 001

WIR TX75 C 2-Channel Infrared Transmitter Architectural and Engineering Specifications:

  • The infrared transmitter shall consist of an all in one modulator and emitter operating on 2.3/2.8 MHz or 3.3/3.8MHz. The carrier frequency shall use 50kHz deviation and 50µS pre-emphasis.
  • The transmitter shall have a minimum coverage of 12,000 sq ft with the WIR RX22-4 receiver in single-channel mode.
  • The transmitter shall be housed in a heavy-duty black plastic enclosure with a durable infra-red transparent front lens. It shall be convection cooled without fans. The transmitter includes an omni-directional mounting bracket for various permanent installations.
  • The transmitter shall have a line level phoenix jack input for each of the channels. Each channel shall have an audio input level LED. There shall be a single 3.5mm microphone input with gain control. The mic input shall have a channel selector switch.
  • The transmitter shall have a switch to turn off all indicator LED’s.
  • The transmitter shall have two RJ45 outputs supplying power and baseband signal to two WIR TX75-S slave emitters via CAT-5e cable. Each RJ45 output shall have a green and yellow LED signaling that the slave emitters are receiving power and baseband signal. A single CAT-5e cable supplies power, signal and digital control to the slave unit up to 100 ft from the transmitter.
  • The transmitter shall be powered by a 48VDC universal power supply, 50-60Hz, 100-240 VAC input, 19.2W.
  • The transmiiter shall be covered by a two-year parts and labor warranty, 90 days on accessories.
  • The transmitter operating on 2.3/2.8 MHz shall be the Williams Sound model WIR TX75 C.
  • The transmitter operating on 3.3/3.8 MHz shall be the Williams Sound model WIR TX75 D.


  • Dimensions, Weight: 10.0" W (25.4 cm) x 3.1" D (7.9 cm) x 1.5" H (3.8 cm) w/o faceplate or 2.5" H (6.4 cm) w/faceplate, 0.6 lbs (0.3kg)
  • Color: Black with silver colored silk screen and silver colored faceplate Optional: white colored faceplate
  • Power Supply: Desktop style international power supply with IEC line cord, 100-240 VAC input, 50-60Hz, 24W; 48VDC output
  • DC Power Input: 2.5mm ID barrel connector, 48 VDC, 0.4A center positive
  • Power Indicator: Green LED
  • Sleep/Power Save Mode: Shuts off carrier when no audio is present for 3 minutes
  • Modulation: FM Wideband, ±50kHz deviation max, 50 μS pre-emphasis
  • Carrier Frequencies: WIR TX75 C: 2.3 MHz (Ch1) and 2.8 MHz (Ch2) WIR TX75D: 3.3 MHz (Ch1) and 3.8 MHz (Ch2) Default at power on = carriers off. Carriers are automatically enabled upon presence of audio.
  • Emitter IR Power: 0.7 W
  • Master Only Coverage Area (minimum, 1-Ch mode): 12,000 sq. ft. (1,115 sq. m.) in single-channel mode with the RX22-4 receiver 6,000 sq. ft. (557 sq. m.) in single-channel mode with the RX15-2 receiver 4,000 sq. ft. (372 sq. m.) in single-channel mode with the RX18 receiver
  • Audio Inputs / Controls: 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 2.7k ohm series resistor)
  • Microphone gain adjust: Rotary potentiometer
  • Microphone channel switch: Selects microphone input to Ch1 or Ch2
  • Audio indicators: Yellow LED blinks at nominal audio level. One per channel
  • Indicators On/Off: 2-position switch turns on/off indicator lights
  • ͞to slave" Output/Input: (2) 8p8c RJ45 connectors output 48VDC 0.4A power, baseband RF and a bi-directional RS-485 bus for control and status communications
  • Slave Status Indicators (on ͞to slave" jacks): Green: Power/Unit Status Yellow: Transmit/Cable Status
  • Signal-to-Noise Ratio: 70 dB, (line input)
  • Frequency Response: 95Hz to 17.6kHz, -3dB re 1kHz (line inputs) 125Hz to 17.0KHz, -3dB re 1kHz (microphone input)
  • Total Harmonic Distortion:
    • <1% (1 kHz, nominal deviation, line or microphone input)
    • Operating Requirements: 0-50° C (32°-122°F)
    • Mounting Kit: Wall or Ceiling mount: BKT 024 Omnidirectional mount Optional: slave linking bar (MLB 003)
    • Warranty: 5 Years
    • Approvals: CE, C-tick, FCC, Industry Canada, WEEE, RoHS, CB Scheme
    • Compatible Receivers: WIR RX22-4, WIR RX18, WIR RX15-2
… [ More ]
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