I just recently acquired a Concert Bass (I believe '74?), and I'm having problems running my Big Muff through it. Normally, I ought to get a volume increase. Instead, I got a drastic volume decrease. I plug everything in properly, and when I play clean, it's fine. But as soon as I hit the pedal, it sounds quiet. It sounds distorted, but quiet.
And yes, the battery is fresh, the volume, tone and sustain are all up on the pedal... I've tried different cables with it, too.
I'm basically lost.. any help?