The S4 & S4T compact, versatile speakers feature NEAR's unique driver technologies to produce the highest sound quality in the most durable and reliable loudspeakers available. Precise sound reproduction is achieved with mid/bass drivers employing NEAR's MDTTM and patented MLSTM technologies for superior sound and long-term durability. The high-frequency driver is a 1" titanium diaphragm which perfectly complements the metal-alloy LF driver. A built-in 16W transformer (S4T) makes it compatible with 70V sound systems. The S4T speaker can switch between 70V or low-impedance systems by using a power tap selection switch. NEAR's patented spiderless technology (MLSTM) and advanced materials deliver out-of-the-box performance year after year.