I have been playing either a 60' or early 70's P. No problem lighting the light and the tone is wonderful. I recently went back to my stock 72 Jazz. This Jazz bass will not light the clip light on either the 7Pro or SVP-CL with a firm finger style technique. Obviously weak pups and I've had the exact same thing happen with older Lace Sensors. I will see if the tone changes with one of those reasonably transparent MXR boosters. Anybody else have this issue and did a booster make much of a tonal change? Just seems odd having the input volume dimed and still not clip without aggressive right hand technique.