Hey, I bought a Fender Standard 5-string jazz bass (Mexican) as a back up practice guitar and it is decent for the price but to be blunt, the pickups suck. I play hardrock and metal and these pickups are just weak and low output. Is there a good set of passive pickups i could install that could give me output a major boost? or do i have to go with active pickups/preamp. And if i do go active do i need to get the back of the bass routed out to hold the battery and wiring? thanks in advance!