Stationary FM Receiver/Power Amplifier
LR-100

Highlights

  • Superior audio quality – 80 dB signal-to-noise ratio (SNR), setting the industry’s sound quality standard.
  • 57 channels.
  • 100 % Digital – Listen receivers are digitally-tuned so the transmission won’t drift.
  • Limited Lifetime Warranty with hassle-free support.
  • Programmability – Unneeded channels can be locked so this receiver will access only one or more channels of your choice.
  • Look & Listen™ LCD shows channel, battery status, signal strength and programming information.
  • Uses standard alkaline or nickel-metal hydride (NiMH) batteries.
  • Built in SmartCharge™ won’t allow batteries to overcharge. Charging circuitry is conveniently built into Listen’s receivers.
  • Drop in charging contacts for any of Listen’s many charging cases or a charging plug on the side of the unit.
  • Adjustable squelch control.
  • Selectable audio output.
  • Multiple input options.
  • Remote control capabilities.
  • Optional 12 VDC input.
  • Many accessory options make Listen products ideal for a wide range of applications.

Overview

Listen's LR-100 Stationary Receiver/Power Amplifier is a stationary auditory assistance receiver with a built-in power amplifier. When used with a Listen transmitter, the LR-100 can deliver high quality audio for use in a variety of locations and applications -- most commonly with a wireless audio distributed system. This unit has Listen's signature Look&ListenTM LCD Display showing channel, lock, and battery level. A security cover protects auxiliary and receiver volume, adjustable squelch and trim controls. It has an balanced or unbalanced speaker wire output options. Multiple input options give this unit great flexibility. It's powered by a 15 VAC/1000mA power input or 12 VDC battery. An antenna is needed for reception.

Includes

LR-100 Stationary FM Receiver/Power Amplifier
LR-100 manual
LA-201 15 VAC Power Supply
LA-123 90° Helical Antenna (72 MHz)
LA-124 90° Helical Antenna (216 MHz)
Hex Wrench (for face plate removal)

Configurations

 
LR-100-072 Stationary FM Receiver/Power Amplifier (72 MHz)
LR-100-216 Stationary FM Receiver/Power Amplifier (216 MHz)

Architectural Specs

The Stationary FM Receiver/Power Amplifier shall be capable of receiving on 57 wide and narrow band channels in the frequency ranges of either 72 MHz or 216 MHz. The receiver shall be programmable to electronically lock out unneeded channels. The device shall have an adjustable squelch with an LED indication. The device shall have an audio frequency response of 50 Hz to 15k Hz, ±3 dB at 72 MHz, or of 50 Hz to 10 kHz, ±3 dB at 216 MHz. The signal to noise ratio shall be 80dB or greater. The device will have an integrated 15 watt power amplifier capable of driving an 8 ohm speaker. The device shall be rack mountable and shall have the capability of a remote antenna. The device shall incorporate an LCD display that indicates channel and RF signal strength. The Listen LR-100 is specified.

CAD Drawing

    • Specifications

     SpecificationsLR-100-072LR-100-216
    RFRF Frequency Range 72.025 - 75.950 MHz   216.0125 - 216.9875 MHz
    Number of Channels17 wide band, 40 narrow band   19 wide band, 38 narrow band
    Frequency Accuracy± .005% stability +32 ºF to +122 ºF (0 ºC to +50 ºC)
    Sensitivity.6uV typical, 1 uV maximum for 12 dB SINAD
    AntennaLA-123 90° Helical Antenna (72 MHz)LA-124 90° Helical Antenna (216 MHz)
    Optional AntennasVarious antennas available
    Antenna ConnectorBNC
    ComplianceFCC Part 15, Part 90, Industry Canada
        
    Audio** All system specifications are wireless end to end**
    System Frequency Response50 Hz - 15 kHz (±3 dB)50 Hz - 10 kHz (±3 dB)
    System Signal to Noise Ratio (A-Weighted)80 dB SQ enabled, 60 dB SQ disabled80 dB SQ enabled, 50 dB SQ disabled
    System Distortion<2% total harmonic distortion (THD) at 80% deviation
    Auxiliary Input to Output 25 Hz to 20 kHz (±3 dB) frequency reponse, SNR 80 dB, Distortion: <0.2%
    Balanced Auxiliary InputRear panel, one (1) female XLR-1/4 in combo connector, balanced, 0 dBu nominal input level adjustable, +13 dBu maximum, impedance 600 ohm
    Unbalanced Auxiliary InputRear panel, two (2) phono connectors, unbalanced, -10 dBu nominal input level adjustable,         +7 dBu maximum, impedance 10k ohm
    Balanced OutputRear panel, one (1) male XLR, balanced, 0 dBu nominal output level, +16 dBu maximum, impedance 2k/10 Ohms (line/mic)
    Unbalanced OutputRear panel, two (2) phono connectors, unbalanced, -10 dBu nominal output level,                        +2 dBu maximum, impedance 2k ohm
    Headphone Output (Monitor)Front Panel, one (1) 3.5mm stereo connector, unbalanced, adjustable output level, +7 dBu maximum, impedance 10 ohm
    Speaker OutputRear panel, one (1) detachable terminal block, bridged, adjustable output level, 15/10 watts (peak/RMS) continuous power with 4 ohm load
     
    ControlsSet-up Controls Front Panel                     (Behind Security Cover)Power, test tone on/off, channel up/down, input levels, mix level, contour, monitor volume control
    User ContolsVolume, channel UP/DOWN, SEEK (all controls except volume are lockable)
    Set-up Contors Rear PanelAudio output select (RX Only, RX + AUX, RX or AUX),
    Speaker (Output, Aux), switchable balanced output level
    Remote ControlsEight (8) position detachable terminal block, channel up, channel down, mute
    ProgrammingUnit can be programmed so that only desired channels are displayed to the user, channel selection can be locked by holding the SEEK button 5 seconds.
        
    Indicators VU MeterFour (4) LED (three green, one red)
    PowerIndicated by a green LED when on (front panel)
    RF PowerIndicated on the LCD (low, mid, high)
    LCD DisplayChannel designation, lock status, RF power level, programming (front panel)
    SquelchGreen LED illuminates when the unit is squelched
    Mute Green LED illuminates when the output audio is muted
        
    PowerPower Supply TypeIn line power supply, Listen part number LA-201
    Power Supply InputInput: 120 VAC, 60 Hz, 19 Watts
    Power Supply OutputOutput: 15 VAC, 1 Amp
    Power Supply ConnectorOutput Connector: .02 in (5.0 mm) OD, .01 in. (2.5 mm) ID, barrel type
    Power Supply ComplianceUL Listed
    Optional Battery12VDC, connected via terminal block
    Optional Battery ChargingTrickle charge of optional 12VDC battery through terminal block connection
        
    PhysicalDimensions (H x W x D)1.75 x 8.50 x 9.13 in. (4.5 x 21.5 x 23 cm)
    ColorDark Grey with white silk screening
    Unit Weight2.8 lbs. (1.3 kg)
    Unit Weight with LA-201 Power Supply4.2 lbs. (1.9 kg)
    Shipping Weight5.6 lbs. (2.5 kg)
    Rack MountingOne (1) rack space height, 1/2 rack space wide, one (1) or two (2) receivers can be mounted in one rack space, optional rack mount (LA-326)
        
    EnvironmentalTemperature - Operation -10 ºC (14 ºF) to +40 ºC (104 ºF)
    Temperature - Storage -20 ºC (-4 ºF) to +50 ºC (122 ºF)
    Humidity0 to 95% Relative Humidity, non condensing
        
    Specifications are subject to change without notification
     

    None

    Used With

    Accessories

    Support Documents

    • FAQ

     
    How many LR-100’s can I use in a system?
    As many as you need, the number is endless.
    Can I interface this to an amplifier or powered speaker?
    Yes, both.
    Do I run the speakers in series or parallel?
    It's your choice. However minimum impedance attached to LR-100 speaker amplifier must be greater than 4 ohms.
     
    What is the function of SQ?
    To reduce noise of the systems, Listen offers a noise reduction technology called ListenSQ™ (on 72 MHz and 216 MHZ only). Both the transmitter and receiver must have SQ on to achieve the desired results. If you are planning to use this product with older Listen systems or equipment not manufactured by Listen, you should disable SQ. The LR-100 has an adjustable squelch potentiometer behind the front face plate.
     
    What is the warranty of Listen receivers?
    Limited lifetime warranty. The following cases will void the warranty:
    • Misuse, dropping, or any other noticeable cosmetic damage.
    • Charging alkaline batteries instead of NiMH.
    • Overheating the charging process by closing the lid on the charging case.

    Troubleshooting Guide

    My receiver won't turn on.

    • Make sure that the power supply is plugged in.
    • Make sure you are using the correct power supply (LA-201) for this receiver.

    I can hear some static in the audio. There is only static present.

    • The receiver is not on the correct channel. Press seek until you find a clean channel or manually scroll until you find your desired channel.
    • Make sure that an antenna is connected to the LR-100 and is the correct antenna for that frequency. If using a remote antenna, make sure that the antenna is properly mounted/installed.
    • There are no transmissions in the area.
    • Make sure that the transmitter is transmitting properly.
    • The receiver is out of reception range.

    The audio is intermittent.

    • The receiver is out of reception range.
    • The receiver is not on the correct channel. Press seek until you find a clean channel or manually scroll until you find your desired channel.
    • The squelch setting of the receiver needs to be set to a lower setting (Default 3). This will allow weaker signals to be heard. The receiver may be noisier when signals are weak.
    • The transmitter's RF Power setting needs to be increased to Full.
    • Make sure that an antenna is connected to the LR-100 and is the correct antenna for that frequency. If using a remote antenna, make sure that the antenna is properly mounted/installed.

    The audio sounds distorted.

    • The transmitter is being over driven. Adjust the input and mix level VU meters (front panel LED level lights) so that they are not in the red or adjust so they are barely peaking into the red. Make sure that the rear panel Input 1 and Input 2 level select switches are in the correct position.
    • The receiver is turned up all the way. Turn down the input level slightly on the receiver to avoid distortion.
    • The receiver is not on the correct channel. Press seek until you find a clean channel or manually scroll until you find your desired channel.

    The audio level is very low.

    • Turn up the input level on the front panel.
    • The transmitter's rear panel Input 1 and Input 2 level select switches need to be placed in the correct position.
    • Adjust the input and mix level VU meters (front panel LED level lights) so that they are not in the red or adjust so they are barely peaking into the red. Make sure that the rear panel Input 1 and Input 2 level select switches are in the correct position.

    My LR-100 will not seek or change channels.

    • The unit is locked. Press and hold the SEEK button for 5 seconds to unlock. The padlock icon will extinguish on the LCD display.

    The range of my LR-100 is very short.

    • The squelch setting of the receiver needs to be set to a lower setting (Default 3). This will allow weaker signals to be heard. The receiver may be noisier when signals are weak.
    • Make sure that the LR-100 has an antenna and it is properly connected.
    • If using a remote antenna with your LR-100, the antenna may need to be better positioned. In general, the higher the antenna the more range. Refer to the antenna's user manual for proper mounting and installation strategies for the antenna being used.
    • The transmitter's RF Power setting needs to be increased to Full.
    • A more efficient transmitting or receiving antenna may be needed.

    What is the output power of the LR-100?

    • 10 Watts @ 4 ohm. (peak value)

    How many speakers can I connect to the LR-100?

    • As many as you want. Try to keep the overall load to 4 ohms for maximum performance. A series-parallel combination of (4) LA-316 will deliver 2.5 watts to each speaker, which should provide ample volume for a soundfield environment.

    Can I power the LR-100 with a DC voltage?

    • YES. The LR-100 can be powered by a 12VDC source for remote locations. When it is done this way, the LR-100 is always ON.

    Can I change the channel and mute remotely?

    • YES. The Phoenix connector on the rear of the unit allows the connection of switches to remote the channel and mute controls.

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