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The line-matching transformer shall be a Bogen Model WMT1AS, or equivalent, capable of matching either inputs from, or outputs to, a 600-ohm line. It shall provide a perfect impedance match between a 600-ohm balanced line and the high-impedance input of an amplifier, or the 25V output of an amplifier. Frequency response shall be ±2 dB from 50 Hz to 20 kHz. Less than 0.1 volt across a 600-ohm line shall be required for full output power from an average amplifier (maximum level, +20 dBm). Output shall be approximately 1.73 volts when connected across the 25V output tap or WMT1AS Hi-Z output connection of a Bogen amplifier.
Line input or output connections from the 600-ohm line shall be made via a three-screw terminal strip. Connection to the auxiliary input of an amplifier shall be by means of a shielded cable terminated in an RCA plug. Provisions shall be included to connect the unit to a microphone input. The WMT1AS can also adapt speaker-level signals (25V/70V systems) to a level suitable for the AUX input of an amplifier. The mounting bracket shall allow the transformer to be mounted by means of two steel screws. The unit shall measure 2" W x 2-3/8" H x 1-1/4" D and the product weight shall be 4 oz.