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The Vanco PulseAudio PA-SM21 Stereo to Mono Audio Converter converts a stereo line-level audio signal to a balanced mono output through a 3-pin terminal connector, and can also adapt a balanced mono input to an unbalanced mono RCA output. Housed in a compact, easily mountable metal chassis with a 40Hz-20kHz frequency response, it's a simple fix for matching stereo sources to mono amplifiers or paging systems. It ships with a 3-pin Phoenix connector, mounting screws, and a manual, and is TAA compliant.
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