The Listen Technologies LT-84 ListenIR 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 30,000 sq ft (2787 sq m) coverage area with LR-4200-IR/LR-5200-IR receivers or 7,500 sq ft (697 sq m) 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. Plus, 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 100 ft. (30.48 m) 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.Listen Technologies LT-84 Includes:One (1) LT-84 ListenIR Transmitter/Radiator ComboOne (1) LA-210 12 VDC Universal Power Supply/Power CordOne (1) LA-344 Flexible Mounting HardwareTwo (2) Phoenix Type ConnectorsOne (1) LA-303 Multi-Lingual Assistive Listening Notification SignOne (1) Quick Start GuideListen Technologies LT-84 Features:The best, most cost-effective solution for secureassistive listening in smaller spaces such as; classrooms, courtrooms, corporate meeting rooms, and theatersThe only product of its kind that provides complete, gap-less coverage in small-to-medium spacesThis advanced IR product is simple to use, cost-effective, designed to blend in to any environment, and offers more coverage than similar productsOne (1) LT-84 with a LR-42 or LR-44 ListenIR receiver covers up to 30,000 sq ft (2787 sq m) with LR-4200-IR/LR-5200-IR receivers or 7,500 sq ft (697 sq m) with LR-42/LR-44 receivers with more than twice the IR power with 1.49 watts of any product of its kindAdd up to (4) four expansion radiators (LA-141) for additional coverage, when mounted within 100 ft. (30.48 m) cable length from the LT-84Flexible frequency selection of 2.3, 2.8, 3.3, 3.8 MHz in a single unitTrue one-cable connection via single CAT-5e cable which carries both power and signal to the LA-141 expansion radiatorsFlexible input connectivity of Mic, RCA stereo sum, and Phoenix line level summed on each input channel simplifies installationListen Technologies LT-84 Specifications:Audio:Frequency Response: 20 Hz - 20 kHz (+/- 1 dB) Line Input 63 Hz - 15 kHz (±3dB) System Specification (wireless end-to-end with LR-44)Signal-to-Noise Ratio: >70dB (SNR) Line Input >60dB (SNR) System Specification (wireless end-to-end with LR-44)Total Harmonic Distortion:Balanced Line Input: Mono Input. Two (2) Phoenix Type connector, balanced, +4dBu nominal input, +14dB headroom, impedance 100 kOhmsMicrophone Input: Two (2) 1/8" (3.5 mm) Tip/Sleeve connector, -30dBu nominal input, +14dB headroom, impedance 4.4 kOhms, 5 VDC bias supplyUnbalanced Line Input: Stereo/Mono Input. Two (2) Dual (RCA) Phono connectors, unbalanced, -10dBu nominal input, +14dB headroom, impedance 10 kOhmsControls:Power Switch: Three (3) position switch - Power OFF, Power ON-Indicator Lights OFF, Power ON-Indicator Lights ONLevel Control Knob: Two (2) audio taper rotary potentiometer, counter-clockwise decreases input mix level, clockwise increases input mix levelCarrier 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 appliedAudio Level Indicators: Two (2) Green LEDs, two (2) Red LEDs, Green LED indicates Audio presence and Red LED indicates peaks in the audioRJ-45 Amber LED: Solid Amber indicates carrier is present and IR is being transmittedRJ-45 Green LED: Solid Green indicates power is applied to unit, flashing indicates unit has entered power save modeRF:Number of Channels: Two (2) channels, Selectable carrier frequencyFrequency Accuracy: ±0.005% stability 0 to 50 °CTransmitter Stability: 50 PPMExpansion 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 connectorModulation: FM Wideband, ±50kHz deviation max, 50 µS pre-emphasisCarrier Frequencies: 2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz, SelectablePower Save Mode: Carrier will shut off when no .