Fender Super Bassman 300 with Active Bass

I never have a problem.. last night i was jamming with some guys.. i was on three with master.. they were telling me to turn down.. and we were in a huge nice out building! It sounded fine to me with the Spector bass i was using.. they said it was doing this to them!
Maxellpic2_zps1a4e70d7.jpg
 
Well you just adjust the knobs to suit. I am not an electric engineer but a 9 volt battery or two just boosts the signal strength a bit. Respond in kind at the amp head. I was playing a battery loaded Spector and passive basses too if my memory serves me well when I got my Super bassman. No Big . Dial in to suit. G&L MFD is a little hotter than my also passive Fenders. Just spin the dial on the bass or amp. Best