Car audio did I blow a fuse?

Yes from the info u gave and not being able to look at ur set up myself sounds like the fuse.. Disconnect wiring to battery again and replace it,make sure u out the right size rated fuse back in (most likely a 100A) then reconnect if problem still persists then check ur amp's fuses and all wiring again (fuses can pop and only have a minute fissure in them commonly overlooked) to be safe replace ALL fuses, its only a few bucks but worth it.