WAXED OR NOWAXX
Unwaxed pickups have richer overtones, sound fatter and less held-back. In other words: You get more of everything. For many years I have been dealing with the manufacturing of guitar pickups and guitar players repeatedly confirm how positive their sound is affected by unwaxed pickups.
Wax, for our purpose, is a bad dielectric material (as with capacitors). With an increase in capacity the resonant frequency gets lower which has a negative impact on the overall frequency spectrum of the pickup (Source: Wiki Thomson's oscillation equation, low pass). Assuming a dielectric constant of 3 for wax (~ mean between beeswax, paraffin, etc.), we get a massive decrease in the treble of our guitar tone. Furthermore, the higher weight and the elasticity of wax reduce mechanical vibrational characteristics of the pickup, which results in a reduced deployment of very desired overtones.
PAIN POINT: FEEDBACK
There lies the rub: Unwaxed pickups are prone to create feedback. That's the point where NOwaxx technology comes into play! Through a sophisticated System I managed to kill feedback without using wax. This approach makes the pickups ready for the onstage use without any tonal constraint.
All NOwaxx pickups are hand-made by myself in meticulous single-item production. The hand-lead winding method - insiders call this "scatterwound" - also has a positive effect on the pickups overtones. In order to keep that very high quality standard, I use only the best materials - so using vulcanised fibre for single coils and genuine white copper for humbucker caps goes without saying.