et dans le manuel j'ai ca "FNA Jazzman All FNA Jazzman basses come either with an onboard active MEC 3-way circuit, or Seymour Duncan Basslines preamp (upto 2001 or optional).
**When the switch is in the up position the bridge pick-up is humbucking and routed in series. When the switch is in the middle position the bridge pick-up is single coil and routed as humcanceling with the neck pick-up. When the switch is in the down position the bridge pick-up is humbucking and routed in parallel."
Il faut vraiment que je trouve un moment pour aller voir un luthier et discuter de tout ca.