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Z-LT-84 Transmitter / Radiator Combination Unit

The Z-LT-84 is a 2 channel Infrared transmitter and radiator that is easy to use and install whilst also being a cost effective system that can provide a large area coverage. One CAT-5e cable provides both the power and the audio signal to the transmitter and to the Z-LA-141 expansion radiator.

Combined with Z-LR-4200 and Z-LR-5200 infra red receivers the Z-LT-84 can provide up to 30,000 ft² of coverage without gaps or null spaces. So to provide maximum flexibility in the field the two channel system can use up to four frequencies.

Available with a multitude of mounting and accessories options this infrared assistive listening system can provide for an array of applications.

For more information on Ampetronic ListenIR contact our expert team on: +44 (0) 1636 610062 or email: sales@ampetronic.co

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  • Features
  • Applications
  • Accessories
  • Standards
  • Specification
  • Downloads
    • Affordable, effective, and expandable solution ideal for small to mid-size spaces such as classrooms, courtrooms, boardrooms, and more
    • Multiple frequency options offer additional flexibility and simplicity during installation and setup
    • Offers gapless coverage up to 2,787 square meters (30,000 square feet)
    • Can be expanded with up to four (4) LA-141 expansion radiators for additional coverage area
    • One-cable design utilizes a single CAT-5e to carry both power and signal to LA-141 expansion radiators
    • Multiple input options for easier setup and operation
    •  Assistive listening
    •  Language interpretation
    •  Live theatre
    •  Houses of worship
    •  Courtrooms
    •  Secure rooms
    • Z-LA-423-03 4 Port USB Charger (for LR-4200/LR-5200) (EU)
    • Z-LA-381-03 Intelligent 12 Unit Charging Tray (for LR-4200/5200)-EU
    • Z-LA-484 Road Case 16
    • Z-LA-434 Earphone Extension Cable
    • Z-CW Cleaning Wipes
    • Z-LA-151 Replacement Eartips (for LR-42) (Qty: 20)
    • Z-LA-152 Replacement IR Alkaline Battery Compartment (for LR-42) (Non-Charging)
    • Z-LA-163 Replacement Cushions (for LA-404/LA-405) (Qty: 20)
    • Z-LA-164 Universal Ear Speaker (92 cm length)
    • Z-LA-204-02 7.5 VDC Replacement Power Supply (for LA-350)
    • Z-LA-205-02 30 VDC Replacement/Extension Power Supply (for LT-82/LA-140)
    • Z-LA-205-03 30 VDC Replacement/Extension Power Supply (for LT-82/LA-140) – EU
    • Z-LA-209-02 5 VDC Intelligent 12-Unit Charging Tray Replacement Power Supply (for LA-380/LA-381)
    • Z-LA-210-02 12 VDC Replacement Power Supply (for LT-84)
    • Z-LA-262 Over-the-head Microphone
    • Z-LA-270 Noise Canceling Microphone
    • Z-LA-277 Conference Microphone
    • Z-LA-303 Multi-Lingual Assistive Listening Notification Sign
    • Z-LA-304 Assistive Listening Notification Signage Kit
    • Z-LA-330 Portable Unit Lanyard
    • Z-LA-338 Tabletop Tripod (for LT-84/LA-141)
    • Z-LA-342 Stationary IR Dual Radiator Mounting Bracket (for LA-140)
    • Z-LA-343 Kensington Safety-Security Cable (for LT-84/LA-141)
    • Z-LA-344 Replacement Mounting Hardware (for LT-84/LA-141)
    • Z-LA-346 Portable IR System Carrying Case
    • Z-LA-347-GY Wall Box Mounting Plate-Gray (for LT-84/LA-141)
    • Z-LA-347-WH Wall Box Mounting Plate-White (for LT-84/LA-141)
    • Z-LA-350-02 8 Unit IR Charging/Storage Station (for LR-42)
    • Z-LA-351 8 Unit IR Storage Station (for LR-42)
    • Z-LA-361 High Capacity AA Alkaline Batteries (2)
    • Z-LA-362 Rechargable AA NiMH Batteries (2)
    • Z-LA-363 High Capacity AAA Alkaline Battery (for LR-42)
    • Z-LA-364 NIMH Rechargeable Battery Pack (for LR-42)
    • Z-LA-365 Replacement Battery (for LR-4200/LR-5200)
    • Z-LA-380-02 Intelligent 12 Unit Charging/Carrying Case (for LR-4200/LR-5200)
    • Z-LA-380-03 Intelligent 12 Unit Charging/Carrying Case (for LR-4200/LR-5200) EU
    • Z-LA-381-02 Intelligent 12 Unit Charging Tray (for LR-4200/5200)
    • Z-LA-382 Intelligent Cable Management Unit (for LA-381)
    • Z-LA-401 Universal Ear Speaker
    • Z-LA-402 Universal Stereo Headphones
    • Z-LA-403 Universal Behind-the-Head Stereo Headphones
    • Z-LA-404 Universal Single Ear Bud
    • Z-LA-405 Universal Stereo Ear Buds
    • Z-LA-422 USB to Micro USB Cable (for LR-4200/LR-5200)
    • Z-LA-423-02 4 Port USB Charger (for LR-4200/LR-5200)
    • Z-LA-430 Ear Phone/Neck Loop Lanyard (for LR-4200/LR-5200)
    • Z-LA-431 Intelligent Replacement Belt Clip (for LR-4200/5200)
    • Z-LA-432 Replacement Leatherette Cushions (for LA-402) (Qty:10)
    • Z-LPT-A117 Remote Power Supply Kit (for LT-84)
    • Z-LS-88-02 Portable ListenIR iDSP System
  • FCC Part 15, ICS-03, CE, RoHS, WEEE

  • Frequency Response 20 Hz – 20 kHz (+/- 1 dB) Line Input63 Hz – 15 kHz (+/- 3 dB) System. Specification (wireless end-to-end with LR-44).

    Signal-to-Noise Ratio > 70 dB (SNR) Line Input> 60 dB (SNR) System Specification

    Microphone Input Two (2) 3.5 mm (0.14 in.) Tip/Sleeve connector, -30 dBu nominal input, +14 dB headroom, impedance 4.4k Ohms, 5 VDC bias supply

    Total Harmonic Distortion < 0.1% (THD) Line Input< 2% (THD) System Specification (wireless end-to-end with LR-44)

    Unbalanced Line Input Stereo/Mono Input. Two (2) Dual (RCA) Phono connectors, unbalanced, -10 dBu nominal input, +14 dB headroom, impedance 10k Ohms

    Balanced Line Input Mono Input. Two (2) Phoenix Type connector, balanced, + 4 dBunominal input, +14 dB headroom, impedance 100k Ohms



    Power Switch Three (3) position switch – Power OFF, Power ON-Indicator Lights OFF, Power

    ON-Indicator Lights ON

    Carrier Frequency Selection Two (2), four (4) position rotary switches (2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz)

    Level Control Knob Two (2) audio taper rotary potentiometer, counter-clockwise decreases input

    mix level, clockwise increases input mix level



    Power Supply LED Green LED on in-line power supply indicates AC power is applied

    Audio Level Indicators Two (2) Green LEDs, two (2) Red LEDs, Green LED indicates Audio presence and Red LED indicates peaks in the audio

    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, flashing indicates unit has entered power save mode



    Carrier Frequencies 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz, Selectable

    Number of Channels Two (2) channels, Selectable carrier frequency

    Frequency Accuracy +/- .005% stability 0 to 50 °C

    Transmitter Stability 50 PPM

    Modulation FM Wideband, ±50kHz deviation max, 50 ?S pre-emphasis

    Power Save Mode Carrier will shut off when no audio is present for 15 minutes on both channels

    to preserve radiator life

    Expansion Link Output Two (2) RJ-45 connectors – Provides RF Signal and Power, CAT-5e cable 24

    AWG, 100 ft. maximum cable length, two (2) LA-141s per output connector



    Coverage Area 2,787 m² (30,000 ft²) single channel with LR-4200-IR/LR-5200-IR receivers or

    697 m² (7,500 ft²) single channel with LR-42/LR-44 receivers

    IR Emitter Power 1.49 W



    Power Supply Input 100-240 VAC, 50-60 Hz

    Power Supply Output 12 VDC, 4 A, 48 W

    Power Supply Connector 2.5 mm ID barrel connector, center positive

    Power Output Two (2) RJ-45 connectors. providing Power and RF signal for up to two (2)

    LA-141 expansion radiators on each output

    Power Supply Type In-line switching mode power supply, Listen part number LA-210

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