on the way to dallas a few years back my oldest on his 06 r3 me on my 07 wearing speakers in helmet he said he could tell when a good song came on cuz I usually gained 10 to 15 mph although I never slowed back down mostly old time rock&roll lynyrd,zztop,segar,stones,tull,winter brothers,etc.as for a system on bike kind of useless unless you have a fairing?
Why anyone wants to listen to music while riding is baffling, enjoy the noise of the engine leave the music for home plus it is one less thing to distract you.
I didn't wanted to post this pic because i'm afraid somebody will still the patent but what the hell. here you go people, if you want a stereo go big or go home