During the focused R&D period of perfecting the pro-excel line, DS18 identified The opportunity to spawn off another line since there was a division amongst competition audiophiles and concert/"voceteo" Audiophiles.Therefore, DS18 created the Pro X Audio line, which features a wide variety of midranges that produce concert-like sounds that will knock the wind out of you! This slim midrange speaker was made for our bike music fanatics. IP66 rating, protecting it from any water that might come along the ride.