The p pup on my bass has way to much power compared to the j pup. Can I run a flex core preamp AND emg p/j x off of one 9v? Will that reduce "headroom" or is it not even possible Should I just take out all foam from the p? Lower a bunch? Should I put in a pot to limit the p pup? Can I add a resistor ? I'm pretty low if but I have a buddy who can help me... Open to all suggestions because right now its not sounding great..