- Plug wired earbuds to the output port, check whether the sound is normal.
- Try powering up the TC417 using a different USB charger (5V/0.5-2A).
- Try one different audio cable that connecting the TC417 and your audio source.
- Clear paired history of BOTH the TC417 and your headphones.
FOR AV RECEIVER:
- ONLY use the BIG 6.35MM PHONE OUT on front side of your AV Receiver with the 6.35mm to 3.5mm adapter, DON'T use the any L/R ports on back of your AV Receiver.
- Do NOT set the volume too high.
- Plug wired earbuds to the port, check whether the sound is normal.