Hi Ricky, I don’t know much about the technical side of things but when I was looking to fit new ones in one of my precision’s I wanted a deeper bass sound and , a few early precision’s I’ve looked at had the original pickups replaced with DiMarzio ones ,which sounded quite bright to me, I opted for Toneriders which gave me nice lows and wasn’t so bright, I also had the cap changed which seemed to give a warmer sound, just a few options for you to look into 🙂