I've used Sena products for over 5 years. Starting with SMH10 units and now with 20s units. Our primary use is rider to passenger and we've been happy so far.

We're traveling with another couple and they are using 20s units for rider to passenger as well. When we pair all 4 units for a group intercom we get a lot of static. All units have the latest firmware and have been factory reset.

Anyone have any suggestions?

 

is the static coming from your backseat?