Using multiple wireless microphones with Voice Amplification Mode

HDL300 or Dual HDL300 systems and Nureva® Console
Last Updated: September 27th, 2021

Most wireless headset or earset microphones with an XLR out connection are supported for use with HDL300 and Dual HDL300 systems and Voice Amplification Mode. More than one microphone can be used in situations with multiple presenters.

 Required before you start:

  • Ensure XLR male to XLR female cables are available
    • Each microphone will require a cable
  • The cables, microphones and mixer are purchased separately
  • See your audiovisual reseller to purchase the cable, microphones and mixer

NOTEThe connect module for the HDL300 and Dual HDL300 systems only supports mono and unbalanced audio inputs. 

Follow these steps to set up voice amplification:

Step 1: Connect the system

Setting up the HDL300 system or Dual HDL300 system

  • Connect the PoE cables (provided) to the RJ45-1 ports on the connect module to the rear port on each microphone and speaker bar
  • Connect a computer to the connect module using the USB-A to USB-B cable (provided)
  • Connect the power cable and power supply to the connect module and plug into a power source

Connect the connect module, mixer and microphones

  • Using the balanced XLR to unbalanced 3.5mm TRS adapter cable
    • Connect the cable to the XLR output port on the back of the mixer
    • Connect the cable to the Aux in port on the back of the connect module
  • Using the XLR to XLR cables, connect each microphone to the mixer
    • Connect each cable to an XLR input on the back of the mixer
    • Connect each cable to the XLR output on the back of each microphone receiver 
    • Set microphone receivers to Line level output if this feature is available
    • Turn off "phantom power" if the mixer has this feature
    • Connect the mixer and microphone receivers to the power source using the power cables and power supplies

Connection diagram


Pair the transmitters to the receivers

Ensure each headset or earset is disconnected from the transmitter at this time
  • Pair each microphone individually
  • Turn on the transmitter and pair following the microphone's instructions
  • Set the group and channel according to the microphone's instructions

Step 2: Adjust volume output on computer

Turn up or down the speaker volume

The volume setting on the computer affects the amplification level. Start with the volume set at a level that would normally be used in the room.

  • Windows® 10 computer
    • Locate and click on the speaker icon in the bottom right corner, on the taskbar
    • Move the slider control to adjust the volume as needed
    • This can be adjusted at any time
  • macOS® computer
    • Locate and click on the Volume control in the menu bar
    • Move the slider control to adjust the volume as needed
    • This can be adjusted at any time

Step 3: Adjust settings in Nureva Console

The instructions below are completed using Nureva Console cloud.  Voice Amplification Mode is not currently available in Nureva Console client.

Adjust Speaker settings

  • Navigate to Device settings, and open Speakers
  • Select Custom to adjust the Bass and Treble settings
    • Set Treble to 50
    • Set Bass to 50
    • If there is no distortion during testing, the Bass setting can be increased to meet individual preferences

Disable Sleep mode

  • Navigate to Device settings, and open Auxiliary ports
    • Ensure that Sleep mode is set to OFF by sliding the toggle to the left

Enable Voice Amplification Mode

  • Navigate to Device settings and open Voice Amplification Mode
  • Enable Voice Amplification Mode by sliding the toggle to the right
  • Click on Apply at the top of the Device settings dashboard


Adjusting the Aux in level

  • Set the  Aux in setting to Line level to match the receiver

Adjusting the Amplification level

  • Start with the Amplification level at Medium (Default)
  • Select the Amplification level that provides the best quality voice amplification

Step 4:   Test the amplification

Test the system

  • Connect each headset or earset to their transmitters
  • Stand approximately 1 to 2 meters in front of the HDL300 microphone and speaker bar
  • Have another person stand at the back of the room or where students will be seated in the classroom
  • Test each microphone separately
  • If a UC&C client (e.g. Microsoft® Teams, Zoom) will be used, test the amplification setup with a remote person in an audio or video conference

Adjust amplification

  • Set the level (volume or gain) for each microphone channel to low on the mixer
  • Adjust the output level for each microphone
    • Adjust the gain on the microphone transmitter or receiver
    • Slowly increase the level for the microphone channel on the mixer
    • Fine-tune the transmitter and mixer for each wireless microphone until the desired output levels are reached
  • If there is feedback or squelch, lower the gain or dB setting for the microphone transmitter and ensure that Aux in is set to Line level

NOTEThe gain or dB settings when using multiple microphones with a mixer will be different than when using a single microphone that is directly connected to an HDL300 or Dual HDL300 system.



Important information

Do not use a "y" splitter to add more than one microphone to the connect module.

  • This will send voltage from one receiver to another
  • It will be difficult to achieve the desired amplitude from each microphone
  • Damage may occur to one or more microphone receivers
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Explore additional information about Voice Amplification Mode.

Review Voice Amplification Mode FAQs.

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