I've had my V1 since 1999, it wasn't the older version but the smaller/slimmer up to date shell. I recently sent it in for a full upgrade which it is showing 3.872.
Upon startup of the engine when the V1 does the startup sound the V1 has a distorted sound. However if I just turn the car on (don't start the engine) the V1 sounds & starts up fine.
I called V1 technical support and Mike told me that the newer V1 units have a voltage checker (or something similar sounding) and that my car is sending more voltage to the V1 at engine startup. I may be explaining this wrong but I'll try...
My V1 is hard wired into my Audi S5 and hasn't had this problem before. Mike mentioned try hard wiring it to a different fuse to see if that would fix it.
Has other people noticed this and what have you done to remedy it. With this recent odd problem and the constant alarms going off because of the Audi Side Assist, I am considering getting another radar detector.