I've been drafted to do the sound for a few live gigs of a band I've been working with in the studio. I have nearly no experience or training with live sound. I've got a few questions to that extent. 1. What SPL should I be aiming at? I know that 97dB is safe for 30 minutes at a time, which is the approximate legnth of a set they're doing. 2. How feasable is keeping the SPLs down to 85-97 dB in a live set?