The new LT-84 ListenIR 2-Channel Transmitter-Radiator is the only product of its kind that provides complete coverage in a wide variety of venue spaces. This advanced IR product is simple to use, cost-effective, designed to blend in to any environment, and offers twice the amount of IR power of similar products, and up to six times the coverage area.

A single unit provides up to 2,787 m² (30,000 ft²) coverage area with LR-4200-IR/LR-5200-IR receivers or 697 m² (7,500 ft²) with LR-42/LR-44 receivers in single channel mode, ensuring that the entire room has coverage without gaps or null spots. The LT-84 is the first IR system with Expansion Radiators (LA-141) that implement delay compensation—no signal cancellation drop outs.

It is the only two channel Transmitter-Radiator with up to four frequencies; 2.3 MHz, 2.8 MHz, 3.3 MHz, or 3.8 MHz, providing flexibility in the field and eliminating the need to purchase a specific frequency based transmitter-radiator. In addition four (4) Expansion Radiators (LA-141) can be added for additional coverage, when mounted within 30.48 m (100 ft.) cable length from the LT-84.

A single CAT-5e cable carries both power and signal to the LA-141 Expansion Radiators making it a true one-cable connection. Easy installation includes mounting hardware for wall, ceiling, or table mounting and a multi-lingual legislative compliance sign. Flexible frequency selection and input connectivity minimizes on-site installation hassles.

Product 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.
• The LT-84 with one channel covers 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.
• Add up to (4) four expansion radiators (LA-141) for additional coverage, when mounted within 30.48 m (100 ft.) 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.

Product Specifications

General

• Audio
  • 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 (wireless end-to-end with LR-44)
  • 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
• Controls
  • 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
• Indicators
  • Power Supply LED: Green LED on in-line power supply indicates AC power is applied
  • Audio Level IndicatorsTwo (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
  • 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
• IR
  • 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
  • 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
  • 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)
• 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
  • Standards: FCC part 15, ICS-03, CE, UL, CUL, C-Tick, CCC, PSE, KC, GS, RoHS, WEEE
  • Power Supply Compliance Marks: CUL, UL, CE, CCC, C-Tick, KC, PSE, GS, FCC, RoHS
• 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.

Physical & Dimensions

• Height: 381mm
• Width: 272mm
• Depth: 105mm
• Unit Weight: 0.8 lbs. (0.4 kg)
• Unit Weight with Power Supply: 1.8 lbs. (0.8 kg)
• Shipping Weight: 3.4 lbs. (1.54 kg)

What's in the Box?

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