Pertronic PSSB401 is a 100V Line Speaker (1.1 W max) and line transformer mounted in an aesthetically pleasing acoustic enclosure. The enclosure is designed to support a System Sensor B401 Conventional base and detector. When used in conjunction with the Pertronic 20W and 50W 100V line amplifiers it provides a cost effective solution for speaker based building evacuation systems that must comply with the NZS 4512:2003 and AS 2220 standards.