DESIGNED FOR PERFORMANCEThe speaker series has been carefully designed from the ground up to ensure that all of the necessary components for a portable system will work together in the most efficient manner, not only providing increased performance levels but also reliability. These design improvements have extended also into the construction of the speakers, making them sturdier than ever and tough enough to handle the impacts incurred by road use. The SF series will satisfy the demand by professional users for a 3-way loudspeaker system that is light weight, portable and tough while also delivering superior sound quality.LOW FREQUENCYThe low frequency driver with neodymium magnet is light but can deliver a smooth frequency response while handling very high sound pressure levels. The large diameter voice coil offers not only efficiency, but exceptionally low distortion for truly clean lows.HIGH FREQUENCYFeaturing a high quality voice coil, the HF compression driver is used to deliver crystal clear highs. The 90°×45° directivity wave guide horn ensures broad, consistent coverage over the entire audience area.RELIABILITYAll loudspeakers must endure extremely tough testing, including an overload test, to ensure years of reliable service. Builtin HF and LF protective circuitry and an extremely rugged composite enclosure with metal grille ensure that all loudspeakers can withstand the rigors of road abuse.Note : NO BATTERY INSIDE