I have Bell Mag 9 helmets that are specifically designed for the smh 10. So far my review is mixed. The sound quality at speed between the wife and I is not that good. The Bell helmet has a lot of wind noise (stock F6B windshield) so we use ear plugs. at low speeds the intercom works great but 60ish its poor. I want to eliminate the speakers and go with custom fitted ear plugs with buds built in unless someone out there has any suggestions.