The bassist for our band is about to get a new rig and we wanted to get some opinions first. Right now we have a Peavey Firebass 700 head and a Hartke 4x10 cab. It sounds ok but just isnt loud enough for our shows, especially since we only have 1 guitarist now. We were looking into getting a GK 100RB head, or maybe an Ampeg SVT 3 Pro. What are some opinions on these heads. Will they be louder than the Peavey right now? Also will either of these work well with an Avatar cab? Thanks!