I run Gt air 1, wife just bought NXR in infinity sale. We use cardo pack talk bold with JBL speakers that fit flush in both helmets. We each have a bike rather than rider pillion. I wear foam Earplugs, wife does not, sound quality good in both set ups. notes. Sticky pad used on helmets. Set up each cardo on a smart phone for radio channels. If you but duo with two systems, note one is master; info useful if you are meshing to at other cardo OR blue tooth to a non mesh. In settings on app choose RDL, this makes radio auto select better frequency on pre defined radio setting through app. Voice control works well and saves fiddling with unit while riding. overall well pleased I run shoei and cardo.
