Skip to main content

Troubleshooting

No Signal for Analog Input​

  • Verify M8RX has power (front LED illuminated).
  • Check input connections, input gain (in input is "A" or "B"), input volume controls, and master volume control.
  • Check output devices, headphones, wireless transmitter/receiver, monitor amplifiers, etc.
  • Test input source and output device with other known good equipment to rule out the fault through a process of elimination.

No Signal for Dante Input​

  • Check the Dante audio signal present LED below the volume knob on the M8RX and verify volume knob and master volume knob are turned up enough.
  • Check routing in the Dante Controller software and make sure there are green check marks on the M8RX receive channels to indicate that a source is routed.
  • If there are red circle-backslash symbols on the M8RX Dante receive channels in Dante Controller, verify that the M8RX and the source you are trying to send are set to the same sampling rate. (Dante devices do not follow sampling rate changes. You must change the sampling rate on all devices individually in Dante Controller).
  • If there are yellow exclamation symbols on the M8RX Dante receive channels in Dante Controller, this indicates that the source is missing from the Dante network. Verify source network connectivity and power. Try rebooting the source device.

Input "C" is only coming out of one ear​

  • Input "C" is a stereo input, you must feed audio into both channels.
  • If you are using the 1/8" Analog input "C", you must use a 3 conductor 1/8" connector (TRS) and there must be signal on both the tip and the ring. The tip is the left ear and the ring is right ear.
  • If you are using the Dante input "C", you must route audio to both channel 3 and 4. Channel 3 is the left ear and channel 4 is the right ear.

Power goes out and comes back on when volume is turned up​

  • The M8RX requires 15 watts of power. If you are using a PoE power supply that is not PoE+ it will typically turn off the power to the port that the M8RX is plugged into whenever it exceeds 13 watts. You must make sure to use PoE+ network switches and power injectors to power the M8RX.

The headphone amplifier fault indicator is on.​

  • The fault indicator indicates either a short circuit or excessive load.

Unable to route audio in Dante Controller​

  • Verify that the M8RX and the source you are trying to send are set to the same sampling rate. The M8RX can only receive audio from 2 different Dante devices (2 different receive streams).
  • This indicates a communication problem between the Audinate Ultimo processor that handles the Dante audio and the microcontroller that processes the gain and handles the push buttons and status LEDs. Try rebooting the M8RX. If the problem persists, please contact technical support.

Hum or buzz in audio​

  • Ensure you are not using shielded Cat6 cables. Use only unshielded Cat6 for M8RX ethernet connections.

Mixers reboot when others are plugged in​

  • Use only unshielded Cat6 for connecting M8RX ethernet to the network. Do not use shielded Cat6 cables.

Further Assistance​

If you need further assistance, feel free to contact Hear Technologies technical support by phone at +1-256-922-1200 or visit our website at www.HearTechnologies.com.