A Qahal that appoints a low-volume Sha"tz has "hatat haqahal t'luyah b'tzavaram"
Because his voice will not carry past "arba amot"
Something to ponder in larger Minyanim when those in the back cannot hear the sha"tz clearly and there might not be room in the front
And even in smaller minyanim, the listeners have a right to hear the hazarat hasha"tz
And to respond amein, etc.