Hi! My good old trusty mim fretless jazz was upgraded years ago with Fender vintage noiseless pickups. It is my understanding that these were designed to work better with an active preamp, which is not surprising because the output ain’t too high. I’m thinking of a simple mod, to use the tone knob’s hole in the control plate to put in a stacked knob preamp. Any suggestions on a specific model that would sound good with a fretless, with which I could control the sound to enhance the mwah, perhaps.