Stationary RF Receiver/Power Amplifier (72 MHz)

Item:LR-100-072b Price: Original price was: $723.60.Current price is: $578.88.B-STOCK

Used in conjunction with your Listen Technologies transmitter, the LR-100 RF Receiver/Power Amplifier delivers clear, high-quality audio performance ideal for multiple locations and applications.

Multiple input options make the LR-100 flexible to fit your specific venue and system needs, including wireless audio distribution. Our signature Look & Listen (TM) LCD display provides at-a-glance information about channel, lock, and battery status, and an integrated security cover prevents unauthorized changes to volume, squelch, and trim adjusments.

The LR-100 can be powered by either a 15 VAC/1000mA power input or 12 VDC battery, and requires only an antenna for proper reception.

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One (1) LR-100-072 Stationary RF Receiver/Power Amplifier (72 MHz)
One (1) LR-100 manual
One (1) LA-201 15 VAC Power Supply
One (1) LA-123 90° Helical Antenna (72 MHz)
One (1) Hex Wrench



  • 100% digital signal for accurate channel locking and reliable reception
  • Programmable for locking in one or several of the 57 compatible channels
  • Superior audio quality thanks to an 80 dB signal-to-noise ratio (SNR)
  • Look & Listen (TM) LCD display clearly shows battery status, signal strength, and programming information
  • Built-in Smart Charge prevent battery overcharging and maximizes battery life
  • Drop-in charging contacts for use with Listen Technologies charging cases
  • Multiple input options and selectable output for added flexibility
  • Compatible with standard alkaline and NiMH rechargeable batteries
  • Optional 12 VDC power input available
  • Backed by Listen Technologies’ limited lifetime warranty and hassle-free support




Frequency ResponseSystem: 50 Hz - 15 kHz (±3 dB)Input to Output: 25 Hz to 20 kHz (±3 dB)
Signal-to-Noise Ratio80 dB SQ enabled, 60 dB SQ disabled (A Weighted)
Distortion< 2% total harmonic distortion (THD) at 80% deviation
Input/sOne (1) female XLR-1/4 in combo connector, balanced, 0 dBu nominal input level adjustable, +13 dBu maximum, impedance 600 ohmTwo (2) phono connectors, unbalanced, -10 dBu nominal input level adjustable, +7 dBu maximum, impedance 10k ohm band, 40 narrow band


User ControlsFront: Power, test tone on/off, channel up/down, input levels, mix level, contour, monitor volume controlRear: Audio output select (RX Only, RX + AUX, RX or AUX),Speaker (Output, Aux), switchable balanced output levelRemote Controls: Eight (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.


LCDChannel designation, lock status, RF power level, programming (front panel)
Power LEDIndicated by a green LED when on (front panel)
VU MeterFour (4) LED (three green, one red)
RF PowerIndicated on the LCD (low, mid, high)
SquelchGreen LED illuminates when the unit is squelched
MuteGreen LED illuminates when the output audio is muted


Frequency Range72.025 - 75.950 MHz
Output/sOne (1) male XLR, balanced, 0 dBu nominal output level, +16 dBu maximum, impedance 2k/10 Ohms (line/mic)Two (2) phono connectors, unbalanced, -10 dBu nominal output level, +2 dBu maximum, impedance 2k ohmOne (1) 3.5mm stereo connector, unbalanced, adjustable output level, +7 dBu maximum, impedance 10 ohmOne (1) detachable terminal block, bridged, adjustable output level, 15/10 watts (peak/RMS) continuous power with 4 ohm load
Number of Channels17 wide band, 40 narrow band
Sensitivity.6uV typical, 1 uV maximum for 12 dB SINAD
Frequency Accuracy± .005% stability +32 ºF to +122 ºF (0 ºC to +50 ºC)
Antenna TypeLA-123 90° Helical Antenna (72 MHz)
Antenna ConnectorBNC


Power Supply Input120 VAC, 60 Hz, 19 Watts
Power Supply Output15 VAC, 1 Amp
Power Supply Connector.02 in (5.0 mm) OD, .01 in. (2.5 mm) ID, barrel type
Optional Battery12VDC, connected via terminal block
Optional Battery ChargingTrickle charge of optional 12VDC battery through terminal block connection
Power Supply TypeIn line power supply, Listen part number LA-201


ColorDark Grey with white silk screening
Unit Weight with Power Supply4.2 lbs. (1.9 kg)
Shipping Weight7.0 lbs. (3.2 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)
Dimensions (H x W x D)1.75 x 8.50 x 9.13 in. (4.5 x 21.5 x 23 cm)
Weight2.8 lbs. (1.3 kg)


Temperature - Operation-10 ºC (14 ºF) to +40 ºC (104 ºF)
Temperature - Storage-20 ºC (-4 ºF) to +50 ºC (122 ºF)
Relative Humidity0 to 95% Relative Humidity, non condensing


Power Supply ComplianceUL Listed
RFFCC Part 15, Part 90, Industry Canada



+What is the function of SQ?

To reduce noise of the systems, Listen offers a noise reduction technology called ListenSQ™. 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.

+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.