I see what you mean!
Is the Bluetooth signal digital and the aux is analog?
In my car the music sounds much better with a memory chip plugged into USB rather than through aux.
I do not have Bluetooth in the car but I think that would be digital (with some conversion???)
Maybe with the I phone you could plug the phone into the usb and get digital. I don't think the Android Galaxy S5 will work trough the usb / it doesn't in my car anyway.
I use the usb memory card on the F6B or Seena Bluetooth to my in helmet speakers.
Steve
I have a ram mount on my clutch perch so with bluetooth in can change stations without stopping.
I would like to ask a question. So if I would like to do the same thing, do I even need a cigar plug or would 2 usb's be good enough. How do you get 2 cigar plugs and 2 usb's in that cubby. Do you have any pictures.