I have a school paging system that has a 70V 5W output per port to a speaker. I have a gymnasium that needs to be louder than that. Off from one of those ports, I have installed a Bogen WMT1AS which is supposed to step down the 70V output to a line balanced input to an aux input of a Bogen C60 amp. From the 70V port output of the C60, is a 70V 15W horn that has a volume adjuster on it. With both the amp and the speaker set at 1 volume, it is way too loud for a double size school gym. I would think that both volumes set at 1 should be almost a whisper. Am I doing something wrong or is something else I can do?