and I'm sure someone else has commented on this, and/or you have thought about this: But, you have to trace the signal all the way back to the source input which is your voice or whatever you're putting through the microphone if you don't have a strong signal to begin, with your gain stages will...
make sure the gain is set optimally on your standalone (green into yellow never red) then on your PA head, set your gain to zero and very gradually increase it so you have a green-to-yellow-never-red signal coming from your PA head.
but not exclusively, right? I assume the master will need to change somewhat based the category of listening device? If a single master can translate equally across devices, then I would REALLY appreciate recommendations for mastering plugins. And THANK YOU!
and it will all be streamed into $100 ill-fitting sonically starved earbuds, where listeners will judge the quality by a grunt or over used cheap organ loop.