I have the G4 power set... and my friends' has a speaker that goes out... then back... THEN, my unit began it too.
A am just about FED UP with this Scala product... WAY to much $$$ for edsel like performance.
I am thinking the Sena product may be a better system.
2010 Lava F800GS...AKA "Dirty Harry"
1998 R1200C Classic Black...AKA "Dick The Cruiser"