Bogen WMT1A Hi-Z Line Input - 500 Ohm Matching TransformerModel 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 music on hold. It is compatible with any amplifier having a 25V output terminal. Features Hi Z,