I didnt wear a helmet until this year so I dont have much experience with other helmets but I would recommend against just the regular RED headphones you can buy seperate and put in any compatible helmet. Compared to the audio that comes in the the Frends editions it sounds like shit, or even compared to a decent pair of any headphones it sounds like shit. No bass and scratchy. Before I rocked the helmet I used a pair of the skullcandy headphones that are built for beanies/helmets that wrap around your ear. These were really good but no mute button.
Cool thanks man. I'm thinking I might just pick up a Pro-tec helmet and invest in some nicer speakers to put in them.