The Bogen S4 wall mount loud 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. NEAR's patented spiderless technology (MLSTM) and advanced materials deliver out-of-the-box performance year after year.