Comments about LDM Vandal Soundtracks Helmet Audio System:
Fits the helmet perfectly. The sound quality is good, but not deafening with my ipod as the sound source. Probably just as well from a safety point of view. The speaker got dislodged in one ear pad, but I managed to reposition it and it seems fine. Time will tell on durability. The cord has a mute switch and volume control. Remains to be seen how it hold up in wet snow.