HDJ-F10 Wireless Audio Only Works in One Ear – Exhausted All Troubleshooting. Any Ideas?

I'm hoping someone has seen this before.

My AlphaTheta HDJ-F10 headphones have developed an issue where wireless audio only plays through one earcup. Even the headphones' voice prompts (audio assist) only play through the right ear. However, when I connect them using the included audio cable, both left and right channels work perfectly with my XDJ-AZ.

Because wired mode works normally, I don't believe the speaker drivers are damaged. It seems like the problem is related to the internal wireless circuitry.

To save everyone time, here is everything I've already tried:

• Performed a factory reset by holding the multifunction and Volume (+) buttons for 5 seconds.

• Removed and re-paired the headphones from all devices.

• Tested using both XDJ-AZ SonicLink and iPhone Bluetooth. Audio only plays through one earcup

• Tested with multiple audio sources:

  • AlphaTheta XDJ-AZ

  • Smartphone

  • Laptop

• Verified that all devices are outputting stereo audio.

• Checked all accessibility settings, including:

  • Left/right balance

  • Mono audio

  • Stereo output

• Confirmed the issue is identical on every device.

• Fully powered the headphones off and back on multiple times.

• Confirmed that the same earcup is always silent in wireless mode.

• Verified that both earcups work perfectly in wired mode.

At this point, I'm leaning toward a hardware failure affecting the wireless audio path (wireless amplifier, DSP, internal flex cable, or another internal component).

Has anyone experienced this exact issue with the HDJ-F10?

• Were you able to fix it?

• Is there any hidden service mode or additional troubleshooting I haven't tried?

• Or did it ultimately require an RMA or hardware repair?

Any advice would be greatly appreciated before I send them in for warranty service. Thanks!