so I picked up the Firebass last night at GC and it is quite the beast! (weight and tone!)
I also bought this 50w Gorilla amp at music go round for $20 (as is, scratchy pots) to practice with:
I was able to mess with the controls on the rusty box using the little Gorilla and I think I'm getting the hang of using the volume and input gain knobs to get a nice crunch
I guess using the main out helps; I've yet to try it with the Firebass but I'm more confident now that the tone will be killer!!!