Was wondering if there was a "best" way to set up a rectangular room for a band practice room. We are a 4 piece band with keys, guitar, bass, and drums. The pianist plays through a 1x15 300 watt bass amp. We also have a weak PA system for the two vocals (pianist and guitarist). As far as room acoustics go is there a best way to set up a square/rectangular room so that the frequencies dont get lost or too severely mixed to where it sounds like garbage?