Listen Technologies LS-92 ListenIR iDSP Level III System, LT-84-01 Transmitter, 4x LR-4200 IR Receiver, LA-382 Cable Management Unit

SKU: LTLS9201 MFR: LS-92-01
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Key Features

  • Crystal-clear audio: Experience superior sound quality with ListenIR iDSP technology.
  • Assistive listening system: Ideal for theaters, classrooms, and conference rooms.
  • Enhanced connectivity: Features multiple input options for versatile audio integration.
  • Portable design: Lightweight receivers ensure comfortable, extended use for all attendees.
  • User-friendly interface: Simple controls and clear display for effortless operation.
  • Complete audio solution: Includes transmitter, receivers, and accessories for easy setup.
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Special Order?Estimated to Ship: 08/19/2025
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Listen Technologies LS-92 Specifications

Transmitter: Audio

Transmitter: Audio

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  • 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

Transmitter: Controls

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  • 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

Transmitter: Indicators

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  • 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

Transmitter: RF

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  • 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 Degree C

  • Transmitter Stability

    50 PPM

  • Modulation

    FM Wideband, +/-50kHz deviation max, 50 uS 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

Transmitter: IR

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  • Coverage Area

    2,787 sq. m (30,000 sq. ft) single channel with LR-4200-IR/LR-5200-IR receivers or 697 sq. m (7,500 sq. ft) single channel with LR-42/LR-44 receivers

  • IR Emitter Power

    1.49 W

Transmitter: Power

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  • 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)

Transmitter: Environmental

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  • Temperature - Operation

    14 Degree F (-10 Degree C) to +104 Degree F (40 Degree C)

  • Temperature - Storage

    -4 Degree F (-20 Degree C) to +122 Degree F (50 Degree C)

  • Relative Humidity

    0 to 95% relative humidity, non-condensing

Transmitter: Compliance

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  • 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

Transmitter: Physical

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  • Color

    Black with White Silk Screening

  • Counting

    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.

  • Compatibility

    LR-42, LR-44, LPT-A117, LA-141, LR-4200-IR, LR-5200-IR, LR-4200-IR-P1, LR-5200-IR-P1, LP-40-IR-01, LP-41-IR, LP-50-IR, LP-51-IR, LR-X200-IR

  • Dimensions (H x W x D)

    1.5 x 10.7 x 4.1" (3.81 x 27.2 x 10.5cm)

  • Weight

    0.8 lb (0.4kg)
    with Power Supply: 1.8 lb (0.8kg)

Receiver: Audio

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  • System Distortion

    < 2% total harmonic distortion (THD) at 80% deviation

  • Audio Output Jacks

    Two (2) 0.14" (3.5mm) connectors, unbalanced, 0 dBu nominal output level, 16 mW maximum, impedance 32 ohm, accepts mono or stereo phone plug or LA-430 Intelligent Ear Phone/Neck Loop Lanyard

  • System Frequency Response

    63 Hz - 15 kHz ( +/-3 dB)

  • System Signal to Noise Ratio

    > 60 dB

Receiver: Controls

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  • User Controls

    Power on/off and volume up/down

  • Programming

    Via software and USB port, Auto Seek, Jack Sense, Squelch, Auto Power, Auto Off, Stereo, Brightness, Channel Name

  • Set-up Controls

    Press and hold up/down volume buttons for 5 seconds to enterchannel adjust, use up/down to select channel

Receiver: Indicators

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  • Display

    OLED - Channel designation, battery level, unit number, charging status, volume status

  • LED

    Flashes when batteries are low or to indicate charging, solid when fully charged

Receiver: RF

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  • Carrier Frequencies

    2.3 MHz, 2.8 MHz, 3.3 MHz, 3.8 MHz

  • Number of Channels

    Four (4) selectable channels

  • Frequency Accuracy

    +/- .005% stability 32 to 122 Degree F (0 to 50 Degree C)

  • Modulation

    FM Wideband, +/-50 kHz deviation max, 50 uS de-emphasis

Receiver: IR

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  • Coverage Area

    30,000 sq. ft (2787 sq. m) single channel with LT-84/LA-141 or 40,000 sq. ft (3716 sq. m) single channel with LT-82/LA-140

  • Squelch

    Programmable in 20 steps, automatic on loss of IR signal

  • Power Save Mode

    Turns unit off after a specified time of no IR signal, default is 30 minutes

  • Sensitivity

    Better than one (1) nW/cm2 @40 dB SNR

Receiver: Power

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  • Power Supply

    Micro USB connector, 5 V, 500 mA

  • Battery Type

    Lithium Ion

  • Battery Life

    8 Hours of typical use

  • Battery Charging Time

    Fully charged in 2.5 Hours

Receiver: Environmental

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  • Temperature - Operation

    14 to 104 Degree F (-10 to 40 Degree C)

  • Temperature - Storage

    -4 to 122 Degree F (-20 to 50 Degree C)

  • Relative Humidity

    0 to 95% relative humidity, non-condensing

Receiver: Compliance

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  • Standards

    FCC Part 15, ICS-03, CE, RoHS, WEEE, ADA 706, CBC 11B-706

Receiver: Physical

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  • Compatibility

    LA-140-GY, LT-82, LA-365, LA-401, LA-381, LA-405, LA-404, LA-403, LA-402, LA-380, LA-430, LT-84, LA-141, LA-382

  • Color

    Flat Black

  • Dimensions (H x W x D)

    Without Belt Clip: 3.75 x 2.0 x 0.64" (9.6 x 5.0 x 1.7cm)
    With Belt Clip: 3.75 x 2.0 x 0.80" (9.6 x 5.0 x 2.1 cm)

  • Weight

    Without Batteries: 1.9 oz (53.9g)
    With Batteries: 2.8 oz (79.4g)

About Listen Technologies LS-92

An advanced solution for superior audio assistance, the LS-92 ListenIR iDSP Level III System is engineered to enhance the listening experience in larger venues, ensuring that every word is heard with crystal-clear quality. This comprehensive package is designed to meet the needs of venues with up to 100 seats, making it an excellent choice for courtrooms, boardrooms, classrooms, and similar environments.

The system features the innovative LT-84 ListenIR Transmitter/Radiator Combo, which broadcasts high-quality audio across a coverage area of up to 30,000 square feet (2787 square meters) when transmitting a single channel. With the ability to handle up to two audio channels and offering a choice of four mono carrier frequencies - 2.3, 2.8, 3.3, and 3.8 MHz - the LT-84 ensures flexible and reliable transmission.

Included in the set are several LR-4200-IR iDSP receivers, which are equipped with state-of-the-art iDSP noise reduction technology to deliver an unparalleled audio experience. These intelligent receivers are designed to be user-friendly, featuring an OLED display that shows battery status, volume level, and a customizable channel name. They are also equipped with a micro USB connector for convenient programming, setup, inventory control, charging, and firmware upgrades.

The LA-381 Intelligent 12-unit Charging Tray streamlines the management of the receivers, providing an efficient system for dispensing, collecting, and storing the units. This feature not only simplifies the user experience but also ensures that the receivers are always ready for use.

The LS-92 system boasts an impressive signal-to-noise ratio (SNR) of 60 dB or better and a total harmonic distortion (THD) of less than 2%, guaranteeing high-fidelity sound. The audio frequency response ranges from 63 Hz to 15 kHz, +/- 3dB, ensuring that the full spectrum of sound is accurately reproduced.

Each receiver offers the flexibility of being worn with a lanyard or belt clip, and the lanyard includes an integrated neck loop that is compatible with T-coil hearing aids. The receivers are smartly designed to provide customized audio output, whether connected to earphones or the integrated neck loop.

The system's independent channel audio processing features Limiting, Compression, and Noise Gate controls, along with transmit level control and LED level indication. Additionally, the system can power and send RF signals to up to four Expansion Radiators via CAT-5 cable for expanded coverage.

The LS-92 ListenIR iDSP Level III System is not only a cost-effective solution for adding assistive listening capabilities to your venue but also a testament to your commitment to accessibility and inclusivity. With its high-quality audio performance and user-centric design, the LS-92 is the ideal choice for any venue seeking to provide an exceptional auditory experience for all visitors.

Listen Technologies LS-92 Features

  • Pre-configured infrared system comes with everything you need to begin offering secure, high-quality assistive listening in your venue
  • Provides outstanding coverage up to 2,787 sq. m (30,000 sq. ft)
  • Comes with all equipment needed to provide assistive listening in venues up to 100 seats
  • Includes transmitter/radiator combo, several iDSP receivers, and a 12-unit charging tray
  • Crystal-clear audio performance for all listeners
  • Integrated neck loops/lanyards provide compatibility with T-coil-equipped devices
  • Designed for single-channel applications

Product Documents

User Manual

Key Features

  • Crystal-clear audio: Experience superior sound quality with ListenIR iDSP technology.
  • Assistive listening system: Ideal for theaters, classrooms, and conference rooms.
  • Enhanced connectivity: Features multiple input options for versatile audio integration.
  • Portable design: Lightweight receivers ensure comfortable, extended use for all attendees.
  • User-friendly interface: Simple controls and clear display for effortless operation.
  • Complete audio solution: Includes transmitter, receivers, and accessories for easy setup.

What's in the box:

  • LT-84-01 ListenIR Transmitter/Radiator Combo
  • 4x LR-4200-IR Intelligent DSP IR Receiver
  • 4x LA-430 Intelligent Ear Phone/Neck Loop Lanyard
  • 4x LA-401 Universal Ear Speaker
  • LA-422 USB to Micro USB Cable
  • LA-381-01 Intelligent 12-Unit Charging Tray
  • LA-382 Intelligent Cable Management Unit
  • LA-904 Listen Dispensing Log Book
  • Lifetime Limited Warranty