I just bought two new HD headsets for half helmets. I was somewhat disappointed in the amount of noise and static when riding. Lots of wind noise and static when riding. Also, when the passenger set was unplugged mine got louder. Is all of this normal as this is my first bike with intercom system.

 

I have a 2007 Ultra and both headsets work fine together. Yours should too unless there is a defect in one of them.

 

Or the intercom settings are jacked up. Can take a long time for some people to figure them out. Some of the people I ride with have had intercoms for years & still can't set them up right; couple times a season I have to reset everything to working settings for them.

 

As for wind noise you have to wear a good quality 3/4 helmet with face shield, but plugging or unplugging either head set should have zero effect on either headset.