I've been looking for an answer to the same question. Took a gambit and picked up the scalarider q2. Device works great, my folks have a set and love it. However, it didn't hook up to my helmets correctly. I have a set of Nolan helmets and it looks like I'll be going with the n-com system from Nolan. On that note I am looking to sell my scala rider q2 if anyone is interested. Brand new in box, it has been tested but never used or hooked to helmets for the above reasons.
Currently I have a cheap $20 set of headphones from Wally world that I stripped to just the speakers and placed those in the helmet, run the cord to my phone and listen to music.