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Stationary IR Radiator (White or Grey)

Item Code: LA-140-GY, LA-140-WH


Combining a compact, stylish design with outstanding coverage and simple setup, the LA-140 IR Radiator/Emitter from Listen Technologies is an expandable option for any infrared assistive listening application.

Two LA-140 units can be mounted together horizontally or vertically, doubling the power of your system without taking up an excessive amount of space. Additionally, two units can be powered by a single LT-82 transmitter or optional power supply with standard CAT-5 cable, making setup and installation simple.

Each unit includes hardware for mounting on wall, ceiling, desk, mic stand or tripod, making the LA-140 an incredibly versatile choice for nearly any IR assistive listening system.

With a compact design and availability in either white (-WH) or grey (-GY), the LA-140 IR Radiator/Emitter from Listen Technologies is a discreet and dependable choice.

  • Up to 3,716 m² (40,000 ft.²) of maximum coverage per radiator
  • Two (2) radiators can be combined and powered by a single LT-82 transmitter or optional power supply via standard CAT-5 cabling
  • Can be mounted together horizontally or vertically for double the power in a compact space
  • Automatic radiator diode shutoff feature extends radiator life
  • Delay compensation to eliminate dropout in the infrared signal
  • Available in either white or grey for discrete installation in a variety of settings
User ControlsTermination Switch, Delay Compensation Switch, Indicator LEDs on/off, Compatibility Switch
Red LEDIndicates power is present.
Yellow LEDIndicates no connection to transmitter or radiator.
Green LEDIndicates carrier and power are present and radiator is emitting IR signal.
Frequency Range1 MHz – 5 MHz
Input/sBNC Connection. -25 dBm to -5 dBm input nominal
Output/sBNC Connection. -15 dBu nominal
Coverage Area3,716 m² (40,000 ft.²) maximum coverage per radiator when used with LR-4200 / LR-5200 Receivers
Power Supply InputRJ-45 connector. 30 VDC, powered from transmitter via CAT-5 cable or optional LA-205 power supply.
Power Supply OutputRJ-45 connector. 30 VDC, powers up to one additional radiator. (Maximum two radiators powered from each LT-82 transmitter or LA-205 power supply)
Emitter Power3 W
Cable Length250 ft. with (1) LT-82 and (2) LA-140 or 700 ft. with (1) LT-82 and (1) LA-140.
Width8.00 in. (203 mm)
Height5.50 in. (140 mm)
Depth2.60 in. (66 mm)
ColorLA-140-GY (Grey), LA-140-WH (White)
Shipping Weight6.0 lbs. (2.70 kg)
MountingRadiator can be mounted on a wall, on a ceiling, in a corner, on a desk, on a mic stand or on a tripod. Wall box mounting plate fits a standard single gang electrical box.
Weight2.1 lbs. (0.95 kg)
Weight (Loaded)2.4 lbs. (1.09 kg)
Temperature – Operation-14 °F (-10 °C) to +104 °F (40 °C)
Temperature – Storage-4 °F (-20 °C) to +122 °F (50 °C)
Relative Humidity0 to 95% relative humidity, non-condensing
StandardsFCC Part 15, Industry Canada, CE, RoHS
One (1) LA-140 Stationary IR Radiator
One (1) Mounting hardware (allows for wall, ceiling, desk, mic stand and tripod mounting)
Twenty-five (25) ft. (7.6 m) of coax cable, matched color
Twenty-five (25) ft. (7.6 m) of CAT-5 cable, matched color
One (1) Quick Reference Card

Up to two LA-140 radiators can be powered by one LT-82. If additional power is required, order an additional power supply.