drum sound Sena 20s

My friends and i have bought 15  pieces sena 20s about a year ago.

Whe had  a lot of fun with it until a few weeks ago after the last update to version 1.5.

Now if we connect to each other we here a crackling (drum or popcorn popping sound) realy loud. 

Even when i connect to a other brand the sena user wil still here that sound, but the user of the other brand have no problems at all!


Whe allready did a factory reset but that makes no difference at all.

The strange thing is we all did the update on difference computers on difference days but we all have the same problems!


can someone help us?





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