The LT-84 ListenIR 2-channel transmitter-radiator (Pat. 9,712,246) from Listen Technologies provides venues, businesses, government agencies, and more with an affordable and easy-to-use assistive listening solution.

Offering twice the IR power and up to six times the coverage area of similar products, the LT-84 can transmit a clear, reliable signal across 2,787 square meters (30,000 square feet). This signal range ensures that users in any mid-sized space, from the boardroom to the courtroom and beyond, enjoy an uninterrupted audio performance.

The LT-84 is also the first infrared assistive listening system to feature expansion radiators (LA-141), which provide delay compensation to ensure that there are no signal cancellation dropouts. Up to four (4) expansion radiators (LA-141) can be added to the system to offer additional coverage (when mounted within 30.48 m [100 ft.] from the unit).

In addition, the LT-84 is the only two-channel transmitter-radiator that can transmit on up to four different frequencies (2.3 MHz, 2.8 MHz, 3.3 MHz, or 3.8 MHz). This flexibility in the field makes setup and operation even easier, while also eliminating the need to purchase separate, frequency-specific transmitter-radiator units.

With the included mounting hardware, and the flexible frequency selection and input connectivity, the LT-84 is an ideal way to add infrared assistive listening capabilities and ADA compliance to your business or venue.

Features:

The best, most cost-effective solution for secure assistive listening in smaller spaces such as; classrooms, courtrooms, corporate meeting rooms, and theaters.
The only product of its kind that provides complete, gap-less coverage in small-to-medium spaces.
This advanced IR product is simple to use, cost-effective, designed to blend in to any environment, and offers more coverage than similar products.
One (1) LT-84 with a LR-42 or LR-44 ListenIR receiver covers up to 30,000 ft² (2787 m²) with LR-4200-IR/LR-5200-IR receivers or 7,500 ft² (697 m²) with LR-42/LR-44 receivers with more than twice the IR power with 1.49 watts of any product of its kind.
Add up to (4) four expansion radiators (LA-141) for additional coverage, when mounted within 100 ft. (30.48 m) cable length from the LT-84.
Flexible frequency selection of 2.3, 2.8, 3.3, 3.8 MHz in a single unit.
True one-cable connection via single CAT-5e cable which carries both power and signal to the LA-141 expansion radiators.
Flexible input connectivity of Mic, RCA stereo sum, and Phoenix line level summed on each input channel simplifies installation.

Specifications:

Audio
Frequency Response: 20 Hz - 20 kHz (+/- 1 dB) Line Input 63 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 (wireless end-to-end with LR-44)
Total Harmonic Distortion: <0.1% (THD) Line Input <2% (THD) System Specification (wireless end-to-end with LR-44)
Balanced Line Input: Mono Input. Two (2) Phoenix Type connector, balanced, + 4 dBu nominal input, +14 dB headroom, impedance 100k Ohms
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
Unbalanced Line Input: Stereo/Mono Input. Two (2) Dual (RCA) Phono connectors, unbalanced, -10 dBu nominal input, +14 dB headroom, impedance 10k Ohms
Controls
Power Switch: Three (3) position switch - Power OFF, Power ON-Indicator Lights OFF, Power ON-Indicator Lights ON
Level Control Knob: Two (2) audio taper rotary potentiometer, counter-clockwise decreases input mix level, clockwise increases input mix level
Carrier Frequency Selection: Two (2), four (4) position rotary switches (2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz)
Indicators
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
RF
Number of Channels: Two (2) channels, Selectable carrier frequency
Frequency Accuracy: +/- .005% stability 0 to 50 °C
Transmitter Stability: 50 PPM
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
Modulation: FM Wideband, ±50kHz deviation max, 50 muS pre-emphasis
Carrier Frequencies: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz, Selectable
Power Save Mode: Carrier will shut off when no audio is present for 15 minutes on both channels to preserve radiator life
IR
IR Emitter Power: 1.49 W
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
Power
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
Power Supply Input: 100-240 VAC, 50-60 Hz
Power Supply Line Cord: IEC line cord, North America Type B (LT-84-01), Asia and UK Type G (LT-84-02), Euro Type C (LT-84-03), Australia Type I (LT-84-04)
Physical
Unit Weight: 0.8 lbs. (0.4 kg)
Dimensions (H x W x D): 1.5 x 10.7 x 4.1 in. (3.81 x 27.2 x 10.5 cm)
Color: Black with White Silk Screening
Unit Weight with Power Supply: 1.8 lbs. (0.8 kg)
Shipping Weight: 3.4 lbs. (1.54 kg)
Environmental
Temperature - Operation: 14 °F (-10 °C) to +104 °F (40 °C)
Temperature - Storage: -4 °F (-20 °C) to +122 °F (50 °C)
Relative Humidity: 0 to 95% relative humidity, non-condensing
Compliance
Power Supply Compliance Marks: CUL, UL, CE, CCC, C-Tick, KC, PSE, GS, FCC, RoHS
Standards: FCC part 15, ICS-03, CE, UL, CUL, C-Tick, CCC, PSE, KC, GS, RoHS, WEEE

Includes:

One (1) LT-84 ListenIR Transmitter/Radiator Combo
One (1) LA-210 12 VDC Universal Power Supply/Power Cord
One (1) LA-344 Flexible Mounting Hardware
Two (2) Phoenix Type Connectors
One (1) LA-303 Multi-Lingual Assistive Listening Notification Sign
One (1) Quick Start Guide

Listen Technologies LT-84-01 Transmitter/Radiator Combo

Description

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