[Shop-talk] audio system inquiry

[ml]

Something like these perhaps? 
https://www.proacousticsusa.com/commercial-sound-equipment/assisted-listening-devices-systems/assisted-listening-systems/tour-guide-systems.html <https://www.proacousticsusa.com/commercial-sound-equipment/assisted-listening-devices-systems/assisted-listening-systems/tour-guide-systems.html>
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