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TROUBLESHOOT

Get answers to troubleshoot some of our most popular products.

LR-100 Stationary RF Receiver/Power Amplifier

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.

LR-300 Portable Digital RF Receiver (72 MHz)

My receiver won’t turn ON.

  • Make sure that your batteries are installed with the correct polarity.
  • Your batteries may need to be replaced.

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 the correct channel.
  • There are no transmissions in the area.
  • Make sure that the transmitter is transmitting properly.
  • The receiver is out of reception range.
  • The receiving antenna, which is the headset/earpiece cord, needs to be oriented better to pick up the signal better.

The audio is intermittent.

  • The receiver is out of reception range.
  • The receiver is not on the correct channel. Press seek until you find the correct channel.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.
  • Make sure that the transmitter is transmitting properly.

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 volume is turned up all the way. Turn down the volume slightly on the receiver to avoid distortion.
  • The receiver is not on the correct channel. Press seek until you find the correct channel.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.

The audio level is very low, even at full volume.

  • 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.
  • On the transmitter, 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.
  • Your input source to the transmitter is a low level audio source. On the transmitter, the “Process” mode can be turned ON to boost the signal to an appropriate level.

My receiver will not seek or cannot find a channel.

  • The receiver is locked. To unlock, press and hold the SEEK button for 5 seconds. The red LED on top of the unit will flash indicating the lock has been toggled.
  • There are no transmissions in the area.
  • The receiver is out of reception range.

How do I know when my batteries are low?

  • The red LED on top of the unit will begin flashing.
  • The receiver keeps turning off.

My receiver won’t charge.

  • Make sure you are using NiMH batteries.
  • Make sure the battery select switch, located in the battery compartment, is in the NiMH position.
  • Make sure that the power cord is plugged in properly.
  • If using a charging case, make sure that the receiver is properly placed in the charging pocket.

The batteries in my receiver won’t hold a charge.

  • It is time to replace the batteries. Listen recommends that the batteries be replaced every 3 years or after 500 charges.
  • Make sure that the receiver is actually receiving the charge. The red LED on top of the receiver will flash when charging. Since this is the same indication of low batteries, make sure to turn the unit off while charging to ensure that the receiver’s batteries are being charged.
  • Make sure that the unit is being turned off when not in use.

The range of my receiver is very short.

  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.
  • The transmitter’s RF Power setting needs to be increased to Full.
  • A more efficient transmitting or receiving antenna may be needed.

LR-400 Portable Display RF Receiver

My receiver won’t turn ON.

  • Make sure that your batteries are installed with the correct polarity.
  • Your batteries may need to be replaced.

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 the correct channel.
  • There are no transmissions in the area.
  • Make sure that the transmitter is transmitting properly.
  • The receiver is out of reception range.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.

The audio is intermittent.

  • The receiver is out of reception range.
  • The receiver is not on the correct channel. Press seek until you find the correct 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. However, the receiver may be noisier when signals are weak.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.
  • Make sure that the transmitter is transmitting properly.

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 volume slightly on the receiver to avoid distortion.
  • The receiver is not on the correct channel. Press seek until you find a clean channel.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.

The audio level is very low, even at full volume

  • 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.
  • On the transmitter, 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.
  • Your input source to the transmitter is a low level audio source. On the transmitter, the “Process” mode can be turned ON to boost the signal to an appropriate level.

My receiver will not seek or change channels.

  • The receiver is locked. To unlock, press and hold the SEEK button for 5 seconds. The red LED on top of the unit will flash indicating the lock has been toggled and the Padlock icon will extinguish on the LCD display.
  • There are no transmissions in the area.
  • The receiver is out of reception range.

How do I know when my batteries are low?

  • The red LED on top of the unit will begin flashing.
  • The battery icon on the LCD display will display low batteries and begin flashing when extremely low.
  • The receiver keeps turning off.

My receiver won’t charge.

  • Make sure you are using NiMH batteries.
  • Make sure the battery select switch, located in the battery compartment, is in the NiMH position.
  • Make sure that the power cord is plugged in properly.
  • If using a charging case, make sure that the receiver is properly placed in the charging pocket.

The batteries in my receiver won’t hold a charge.

  • It is time to replace the batteries. Listen Technologies recommends that the batteries be replaced every 3 years or after 500 charges.
  • Make sure that the receiver is actually receiving the charge. The red LED on top of the receiver will flash when charging.
  • Make sure that the unit is being turned off when not in use.

How do I adjust squelch on my receiver? Where should I have it set?

  • Hold down the SEEK button while turning the unit ON. The receiver will enter the Squelch Mode. There are 20 available squelch settings, Default is 3. 0 is no squelch and 20 is tight squelch.

The range of my receiver is very short.

  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.
  • The transmitter’s RF Power setting needs to be increased to Full.
  • A more efficient transmitting or receiving antenna mat be needed.

LR-500 Portable Programmable Display RF Receiver

My receiver won’t turn ON.

  • Make sure that your batteries are installed with the correct polarity.
  • Your batteries may need to be replaced.

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 the correct channel.
  • There are no transmissions in the area.
  • Make sure that the transmitter is transmitting properly.
  • The receiver is out of reception range.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.

The audio is intermittent.

  • The receiver is out of reception range.
  • The receiver is not on the correct channel. Press seek until you find the correct 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. However, the receiver may be noisier when signals are weak.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.
  • Make sure that the transmitter is transmitting properly.

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 volume slightly on the receiver to avoid distortion.
  • The receiver is not on the correct channel. Press seek until you find a clean channel.
  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.

The audio level is very low, even at full volume

  • 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.
  • On the transmitter, 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.
  • Your input source to the transmitter is a low level audio source. On the transmitter, the “Process” mode can be turned ON to boost the signal to an appropriate level.

My receiver will not seek or change channels.

  • The receiver is locked. To unlock, press and hold the SEEK button for 5 seconds. The red LED on top of the unit will flash indicating the lock has been toggled and the Padlock icon will extinguish on the LCD display.
  • There are no transmissions in the area.
  • The receiver is out of reception range.

How do I know when my batteries are low?

  • The red LED on top of the unit will begin flashing.
  • The battery icon on the LCD display will display low batteries and begin flashing when extremely low.
  • The receiver keeps turning off.

My receiver won’t charge.

  • Make sure you are using NiMH batteries.
  • Make sure the battery select switch, located in the battery compartment, is in the NiMH position.
  • Make sure that the power cord is plugged in properly.
  • If using a charging case, make sure that the receiver is properly placed in the charging pocket.

The batteries in my receiver won’t hold a charge.

  • It is time to replace the batteries. Listen recommends that the batteries be replaced every 3 years or after 500 charges.
  • Make sure that the receiver is actually receiving the charge. The red LED on top of the receiver will flash when charging.
  • Make sure that the unit is being turned off when not in use.

How do I lock out channels?

  • Enter the program mode by holding the UP and DOWN buttons simultaneously for 5 seconds. The PGM icon will appear. Once in the program mode, scroll through the channels using the UP and Down buttons. Pressing the Seek button will toggle each channel in and out of Lockout. When a channel is locked out, L/O will be displayed on the LCD indicating that channel is locked out.

How do I adjust squelch on my receiver? Where should I have it set?

  • Hold down the SEEK button while turning the unit ON. The receiver will enter the Squelch Mode. There are 20 available squelch settings, Default is 3. 0 is no squelch and 20 is tight squelch.

The range of my receiver is very short.

  • The receiving antenna, which is the headset/earpiece cord, needs to be better oriented to pick up the signal better.
  • The transmitter’s RF Power setting needs to be increased to Full.
  • A more efficient transmitting or receiving antenna may be needed

LT-700 Portable RF Transmitter

What is the range of this transmitter?

  • A range of up to 150 feet is achievable depending upon the following:
  • The orientation of the microphone cord, which is the transmitting antenna.
  • The objects between the transmitter and receiver. All material, especially metal, will weaken the signal strength.
  • The type of receiver and its receiving antenna.

What channels should I be transmitting on?

  • It is recommended that wideband channels are used for best audio quality. If transmitting multiple simultaneous channels, narrowband frequencies may be required.

The signal being transmitted is inconsistent, my receivers cut in and out.

  • The receivers may be out of range of the transmitter.

How do I connect my TV, VCR, CD player, etc. to this transmitter?

  • Listen Technologies provides a Line Input Cable (LA-263) that will allow you to connect an RCA connection to the transmitter.

My microphone sounds very low in audio level.

  • Make sure that the microphone sensitivity switch, located in the battery compartment, is in the correct position. Consult the microphone users manual for the correct setting.

What type of microphones can I use with this transmitter?

  • Any Listen Technologies’ condenser microphone may be used with this transmitter.

My batteries will not charge.

  • Make sure you are using NiMH batteries.
  • Make sure the battery select switch, located in the battery compartment, is in the NiMH position.
  • Make sure that the power cord is plugged in properly.
  • If using a charging case, make sure that the transmitter is properly placed in the charging pocket.

The batteries in my transmitter will not hold a charge.

  • It is time to replace the batteries. Listen Technologies recommends that the batteries be replaced every 3 years or after 500 charges.
  • Make sure that the transmitter is actually receiving the charge. The red LED on top of the transmitter will flash when charging.
  • Make sure that the unit is being turned off when not in use.

When I use the mute function, the auxiliary input can still be heard.

  • The Mute function only mutes the microphone input. Any auxiliary audio input will still be transmitted.

How do I lock out channels?

  • Enter the program mode by holding the UP and DOWN buttons simultaneously for 5 seconds. The PGM icon will appear. Once in the program mode, scroll through the channels using the UP and Down buttons. Briefly pressing the power button will toggle each channel in and out of Lockout. When the channel is locked out, the L/O will be displayed on the LCD indicating that channel is locked out.

LT-800 Stationary RF Transmitter

What is the range of this transmitter?

  • Depends on the following:
    • The frequency of the transmitter.
    • The transmitter’s location.
    • The antenna being used on the transmitter and receiver.
    • The location of the remote antenna (if applicable). In general, the higher the antenna the more range.
    • The length of coaxial cable ran to the antenna from the transmitter (if applicable). Every foot of cable creates a power loss.
    • The RF power setting on the transmitter.
    • The objects between the transmitter and receiver. All material, especially metal, will weaken the signal strength.
  • When using 72 MHz, a direct line of sight distance of 1500 feet from the transmitter can be achieved.
  • When using 216 MHz, a direct line of sight distance of 3000 feet from the transmitter can be achieved.

What channels should I be transmitting on?

  • It is recommended that wideband channels are used for best audio quality. If transmitting multiple simultaneous channels, narrowband frequencies may be required.

How many transmitters can I have operating simultaneously?

  • 72 MHz: 6 simultaneous transmissions
  • 216 MHz: 3 simultaneous transmissions

The signal being transmitted is inconsistent, my receiver cuts in and out.

  • The receiver may be out of range of the transmitter.

What type of microphones can I use with this transmitter?

  • Dynamic microphones can be used when the Input 1 level select switch is in the “MIC” position.
  • Condenser microphones can be used when the Input 1 level select switch is in the “MIC + Phantom Power” position.

I can’t change the channel on my transmitter.

  • The unit is locked on a channel. To unlock, hold the channel select “Up” for 3 seconds. The padlock icon will extinguish from the LCD display.

I can’t access the narrowband channels on my transmitter.

  • The transmitter is in “Basic mode” and all narrowband channels are locked out. To enter “Expanded mode” and transmit on a narrowband channel, hold the channel select “Down” button while turning on the unit.

What does the “contour” knob do?

  • The contour knob boosts or cuts frequencies above 5kHz. It is recommended that this knob be turned counterclockwise for voice and clockwise for music.

What does the “process” feature do? When should I use it?

  • The process feature is a type of Automatic Gain Control. If your input signals to the transmitter are inconsistent in level and you wish to have gain control, then this should be turned on.

Where should I have the input level switches positioned on the back of my transmitter?

  • Depends on the level of audio being input.
  • When using Input 1:
    • MIC position: For a microphone or MIC level input of -55dbu.
    • MIC Phantom Power: For a condenser microphone that needs a 12VDC phantom power supply at a -55dbu level input.
  • When using Input 2:
    • +10dbu/SPKR position: When connecting a speaker or any other higher line level audio input.
    • -10dbu/Line position: When connecting a regular line level input of -10dbu.

My transmitter seems to have lost power/range.

  • Make sure that the antenna is connected properly.
  • Make sure that the RF power switch is in the correct position.
  • A more efficient transmit antenna may be needed.

Can this transmitter be powered with a DC voltage?

  • No. The transmitter must use the supplied 15VAC power supply.

Can I use this transmitter with other manufacturer’s receivers?

  • Yes. Please refer to the frequency compatibility charts in the manual or on the website for channel conversions. When using other manufacturers’ products, SQ (Super Quiet) must be turned OFF.

Best warranty repair turn-around time and tracking procedure I've experienced compared to dozens of manufacturers and distributors.

Rylan Cook
Director, Pacific Audio Works
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