I have no complaint with the volume of the ERR RS Commander with a decent speaker. I install tons of them, and nobody seems upset about the volume.
John, do you use the speaker that comes with the sound system, or do you use a different one? If different, which one, please?
I have been building F-3 B units with fat boy speakers and using tomato paste cans, or large pill bottles for speaker enclosures. They sound good at home and on the bench, but at club layouts they are not loud enough.