I have a pair of Skull Candy speakers that fit in either the collar of my jacket or the ear flaps of my Red helmet; they use the helmet as a kind of sub-woofer that really brings out deep bass (if you use them in the collar, you should buy the optional amp or they're kind of flat sounding). They come with a controller on the cord that allows you to turn on/off and adjust the volume, even with gloves on. Not sure the name of them, I bought them a couple of seasons ago. There should be plenty of even better options by now. They sound great.