that foam disc should/will come out. fwiw i have just got thru 2 pairs of the redphones (in a month) and they work like shit. not just bad audio quality but i mean like shit. every bump and its cutting out, shit. just switched to a skullcandy set for giro's, exact same thing as my red setup, no different tech/compatibility with helmet. the difference was immediately noticeable, hopefully they hold up better over the next few weeks/months.
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