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All purchases from Avantree.com automatically comes with a 24-month warranty.

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For same item orders:

• 5-9receive 5%   off order total
• 10-19receive 10% off order total
• 20+receive 15% off order total

Issue with Sennheiser aptX Low Latency Headphones

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Issue with Sennheiser aptX Low Latency Headphones

This guide applies to all of our products > General Information Go to full support page


We have found that Sennheiser's HD-350BT, HD450BT, and CX350BT seem to have connectivity issues with our Trasmitter Adapters.
Common complaints include:

  • Hard to reconnect
  • Connects but takes a while for sound to come through
  • Transmitter shows it's connected via LL but there's still significant audio lag
  • Cracking noise

Our testing results have shown that the connectivity issues and the audio lag issue often disappear after a few reconnections.

Nonetheless, other customers have contacted Sennheiser about this, and Sennheiser have admitted that they have some firmware issues (further confirmed on the three headphones' Amazon reviews).

If you encounter issues mentioned above, please also contact Sennheiser's customer support and let them know.

Sennheiser US Technical Support: 1 (952) 392-2132
Sennheiser Support Center:  https://en-us.sennheiser.com/service-support