In this Tech Talk episode Steve Araujo and Doug Osterkamp discuss the Leo Fender designed P.T.B (Passive Treble & Bass) System.
Guitars used in this video:
Fullerton Deluxe Doheny:
https://glguitars.com/product/fullerton-deluxe-doheny/
Tribute Series Legacy:
https://glguitars.com/product/legacy-2/