nearwater
Been here awhile...
I just got my car back from the dealer today in regards to this problem. There is no fix for this yet according to them via Hyundai. Hyundai has engineers that are looking into this right now and haven't found a solution yet. They have tried everything from new amps, head units, new rear windshields (where the antenna is) and no of these have fixed the problem. The servive manager thinks it is a software problem. There was an engineer at the dealership today and he also looked at my car. They have had alot of Genesis owners report this problem and are very aware of it. They are supposed to get back to me and I will let all of you know when and what the "fix" is for this issue.
I run into this issue even at low volumes and it doesn't matter if i'm listening to XM, FM, CD etc... I also drop calls via the blue tooth connection when the amp cuts out.
Hope this helps.
Thanks for sharing your story, Carl.
Exactly what I'm experiencing right now.
Never had this problem during winter or spring, but all of a sudden started acting up after a month of storage(was stored during the heat wave).
Happens as often as every couple minutes to once every ten min.
If it's a software bug, fans wouldn't do any good.

I hope they come up with a solution.
It's too good a system to give up.
Dan