I have just bought a new BMW System 6 Evo helmet and I would like to add one or a pair of speakers to it. On examining behind the lining there is a small indentation in the high density foam of dia 35mm which is bigger than the speaker sets I have of dia 60mm in their velcro cases . Can anyone suggest where I can buy very small compact speakers from,so they do not cause a bulge inside the helmet
Thanks
Byron

Thanks
Byron
