The Bogen Model WMT1A transformer is designed especially for matching inputs from or outputs to a 600-ohm line. As an input-matching transformer it may be used to connect telephone systems to most Bogen public address amplifiers for telephone paging. It also functions as an output-matching transformer in feeding program material over a 600-ohm telephone line for in. music-on-holdin. . It is compatible with any amplifier having a 25V output terminal.