1 2

Listen Technologies LA-141 ListenIR Expansion Radiator For LT-84

Listen Technologies LA-141 ListenIR Expansion Radiator For LT-84

SoundPro Item: 51257 | Part Number: LA-141

$629.00
$704.00 $629.00
Your Price Sold out
MSRP: $704.00 | MAP: $629.00

Usually ships in 5-7 business days

  • Expands LT-84 Infrared Transmitter Coverage By Up To Four Radiators Per System
  • Single CAT-5e Cable Delivers Both Power And Dual-Channel Modulated IR Signal
  • Daisy-Chain Topology Supports Two Radiators Per Expansion Output At 100 Foot Intervals
  • Four-Position Delay Compensation Switch Aligns Radiator Timing Across Large Venues
  • Power-Save Mode Disables Carrier After 15 Minutes Of Silence To Extend Emitter Life
  • LA-344 Flexible Mounting Bracket Adapts To Wall Ceiling And Tabletop Installations
  • Dual-Channel Operation Supports Simultaneous Program Audio And Interpretation Feeds
Log in or register for YOUR best price

The LA-141 expands the reach of Listen Technologies' LT-84 infrared platform for installed assistive listening in worship, theater, convention, and corporate venues. Each radiator adds significant square footage of gap-free IR coverage—up to 2,787 square meters with current-generation LR-4200 and LR-5200 receivers, or 697 square meters with legacy LR-42 and LR-44 units in single-channel mode. System designers can cascade up to four radiators per LT-84 to blanket large sanctuaries, auditoriums, or ballrooms without dead zones or listener dropouts.

Installation is streamlined through the use of standard CAT-5e cabling, which delivers both DC power and dual-channel IR carrier signals to each radiator over a single pull. Daisy-chaining is supported for two radiators per expansion output, with runs up to 100 feet on 24 AWG cable. The included LA-344 flexible mounting bracket adapts to wall, ceiling, or tabletop placement, and an optional LA-347 wall-box plate integrates the radiator into standard electrical rough-in. Onboard controls include a four-position delay compensation switch to time-align multiple radiators and a two-position indicator light toggle for commissioning. Power-save circuitry automatically disables the carrier after 15 minutes of silence to extend emitter life.

Engineered for ADA-compliant assistive listening installations, the LA-141 operates on four selectable carrier frequencies between 2.3 and 3.8 MHz, ensuring compatibility with the full range of Listen Technologies infrared receivers. Dual-channel operation supports simultaneous program audio and interpretation feeds. With THD below 2 percent, SNR greater than 60 dB, and frequency response from 63 Hz to 15 kHz, the system meets speech intelligibility and music reproduction requirements for houses of worship, performing arts centers, and conference facilities.

Downloads

View full details

Specifications

Audio
System Distortion (THD)
< 2% (wireless end-to-end with LR-44)
System Signal to Noise Ratio (A-Weighted)
> 60 dB (wireless end-to-end with LR-44)
System Frequency Response
63 Hz - 15 kHz (+/- 3 dB, wireless end-to-end with LR-44)
IR
Coverage Area
30,000 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 Power
1.49 W
Carrier Frequencies
2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz
Number of Channels
Two (2) channels
Power Save Mode
Carrier will shut off when no audio is present for 15 minutes on both channels to preserve radiator life
Connectivity
Expansion Link Input
One (1) RJ-45 connector - Receives RF Signal and Power from LT-84
Expansion Link Output
One (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)
Controls
Indicator Lights On/Off Switch
Two (2) position switch - Indicator Lights OFF, Indicator Lights ON
Delay Compensation
Four (4) position rotary switch setting (0, 1, 2, 3)
Indicators
RJ-45 Amber LED
Solid Amber indicates carrier is present and IR is being transmitted
RJ-45 Green LED
Solid Green indicates power is applied to unit
Power
Power Supply
12 VDC, Provided via LT-84 Expansion Link Output RJ-45s
Current Draw
600 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
Construction
Color
Black with White Silk Screening
Mounting
Can 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
Dimensions (H x W x D)
1.5" x 10.7" x 4.1" (3.81 x 27.2 x 10.5 cm)
Weight
Unit Weight
0.6 lbs (0.3 kg)
Environmental
Operating Temperature
14 °F (-10 °C) to +104 °F (40 °C)
Storage Temperature
-4 °F (-20 °C) to +122 °F (50 °C)
Relative Humidity
0 to 95% relative humidity, non-condensing
Certifications
Standards
FCC Part 15, ICS-03, CE, UL, CUL, C-Tick, CCC, PSE, KC, GS, RoHS, WEEE
Shipping
Shipping Weight
3.0 lbs (1.4 kg)
Included Items
Includes
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

Why Choose SoundPro?

Since 1972, SoundPro has been the trusted source for audio, video, and lighting gear. Whether you're starting your AVL journey or are a seasoned professional, we're here to help you every step of the way.

Start Shopping

  • Certified Account Managers

    Our Account Managers, with 16+ industry certifications, are ready to find your solution.

  • Personalized Pricing

    We know every project is unique. Get a personalized quote anytime you need it

  • Fast Shipping & Local Pickup

    In stock items ship same day if ordered by 4pm CST. Pickup offered in Irving, TX.

  • Accountability from Real People

    We aim for a smooth, transparent experience by setting and sticking to clear expectations.

  • Easy Payments & Financing

    We accept all major credit cards and also offer financing through our partners.

1 2