ListenIR Expansion Radiator (For LT-84 only)

Item:LA-141b Price: Original price was: $670.00.Current price is: $536.00.B-STOCK

The LA-141 Expansion Radiator from Listen Technologies expands on the functionality and coverage area of the LT-84 Infrared Transmitter/Radiator combo system, giving users and clients an uninterrupted, high-performance listening experience.

Up to four (4) LA-141 Expansion Radiators can be added to the LT-84 system, providing additional coverage up to 2,787 m2 (30,000 ft2) with LR-4200-IR/LR-5200-IR receivers or 697 m2 (7,500 ft2) with LR-42/LR-44 receivers in single-channel mode. A single CAT-5e cable provides both power and signal to the radiators, and the included mounting hardware and single-cable design make installation and setup a breeze.

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One (1) LA-141 ListenIR Expansion Radiator
One (1) 25 ft. (7.6 m) CAT-5e Cable
One (1) LA-344 Flexible Mounting Hardware
One (1) Quick Start Guide


  • The only product of its kind that provides complete, gap-less coverage in small- to mid-size spaces
  • Up to four radiators can be added to the LT-84 system providing additional coverage up to 30,000 ft2 (2787 m2)
  • Single-cable CAT-5e provides power and audio signal for ease of setup
  • Simple installation with the included mounting hardware

Also Needed



System Distortion< 2% (THD) System Specification (wireless end-to-end with LR-44)
System Signal to Noise Ratio (A-Weighted)> 60 dB (SNR) System Specification (wireless end-to-end with LR-44)
System Frequency Response63 Hz - 15 kHz (+/- 3 dB) System Specification (wireless end-to-end with LR-44)


Indicator Lights On/Off SwitchTwo (2) position switch - Indicator Lights OFF, Indicator Lights ON
Delay CompensationFour (4) position rotary switch setting (0, 1, 2, 3)


RJ-45 Amber LEDSolid Amber indicates carrier is present and IR is being transmitted
RJ-45 Green LEDSolid Green indicates power is applied to unit


Carrier Frequencies2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
Number of ChannelsTwo (2) channels
Power Save ModeCarrier will shut off when no audio is present for 15 minutes on both channels to preserve radiator life.
Expansion Link OutputOne (1) RJ-45 connector - Provides RF Signal and Power to one additional LA-141.CAT-5e cable 24 AWG, 100 ft. (30 m) maximum cable length, two (2) LA-141s per daisy chain (total daisy chain cannot extend beyond two expansion radiators)
Expansion Link InputOne (1) RJ-45 connector - Receives RF Signal and Power from LT-84


Coverage Area30,000 ft² (2787 m²) single channel with LR-4200-IR/LR-5200-IR receivers or 7,500 ft² (697 m²) single channel with LR-42/LR-44 receivers
IR Emitter Power1.49 W


Power Supply12 VDC, Provided via LT-84 Expansion Link Output RJ-45s
Current Draw600 mA per LA-141, maximum of two (2) LA-141s daisy chained with CAT-5e cable 24 AWG 100 ft. (30 m) to each LT-84 Expansion Link Output


ColorBlack with White Silk Screening
Shipping Weight3.0 lbs. (1.4 kg)
MountingCan be mounted on a wall, ceiling, or table with provided hardware (screws and hollow wall anchors not provided). Optional LA-347 Wall Box Mounting Plate is available for mounting to a standard single gang electrical box.
Dimensions (H x W x D)1.5 x 10.7 x 4.1 in. (3.81 x 27.2 x 10.5 cm)
Unit Weight0.6 lbs. (0.3 kg)


Temperature - Operation14 °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, ICS-03, CE, UL, CUL, C-Tick, CCC, PSE, KC, GS, RoHS, WEEE



+What is the warranty of the LA-141?

The LA-141 has a 3-year warranty. Listen warranty

+What is the purpose of the delay compensation switches?

This switch allows you to set up delay timing in a multi-radiator system so that each radiator receives the carrier at exactly the same time. This prevents signal dropouts that can be caused by out-of-phase signals (multi-path). With Listen’s delay compensation switches, it is not necessary to cut all of your cables to the same length - your shorter runs can use shorter cables, keeping your installation clean (and cost-effective).

+What is the coverage area provided by the LA-141?

7,500 ft² (697 m²) line-of-sight in single channel mode, using a Listen LR-44 or LR-42 receiver.

+Does the number of channels (carriers) affect the coverage area?

Yes, for one (1) channel (carrier), the line-of-sight coverage area is 30,000 ft² (2787 m²) and for two (2) channels (carriers), the line-of-sight coverage area is 15,000 ft² (1394 m²) with LR-4200-IR/LR-5200-IR receivers.

+How many Expansion Radiators (LA-141) can you use on a system?

Yes, for one (1) channel (carrier), the line-of-sight coverage area is 30,000 ft² (2787 m²) and for two (2) channels (carriers), the line-of-sight coverage area is 15,000 ft² (1394 m²) with LR-4200-IR/LR-5200-IR receivers.

+How do I connect multiple Expansion Radiators (LA-141)?

A maximum of two (2) LA-141s can be connected to each Expansion Link output RJ-45 on the LT-84 with a maximum daisy chained CAT-5e cable length of 100 ft. (30.5 m). CAT-5e cable must be at least 24 AWG!