Ok, i used to play nothing but passive p-basses. now that i have my first active bass, i need some help. I put a new battery in the ATK (Active) and i went home, pluged it in, and and found i had to crank my pre gain knob twice as much to get the signal output i had with the passive p-basses. Some ATK owners have said that their is a pot on the inside that increases the gain from the pre amp. i havent looked at it, but do i need to pump this thing up to get a stronger signal?