C'est pas ce que je lis sur la doc pdf du BQC :
The BQC System is a complete control system for bass guitars. Active Balance, Master Volume and EQ circuits are included. The EQ effects are illustrated in the graphs on the next page. They allow you separate control over bass, midrange, and treble. Rotate the controls clockwise to boost, counterclockwise to cut. There is a center detent for flat response. The mid-range control has a variable frequency knob that allows you to sweep through the mid-frequency range from 100Hz to 1KHz. This selects the frequency to boost or cut. The graphs on page 2 depict the frequency response of the controls.
Included in the system are:
1) Active Balance Control (B118)
The ABC Control is designed for EMG Active Pickups. It allows loss-free balance between two pickups and has a center detent for the middle position. If you are using EMG-HZ Passive pickups, or other passive pickups you will want to use the B125 Active Balance Control which features buffered inputs for passive high impedance pickups.
Et le petit module de balance inclus dans le BQC permet d'y connecter directement les micros dessus, pour faciliter le câblage général.
Et :
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des micros spécifiquement "passifs à basse impédance" (Adx6, Emg 45, etc etc, en fait la plupart des Emg non-estampillé HZ),
Les EMG45 sont des micros actifs, ils ont même le câblage livré avec, donc je ne sais pas pourquoi tu dis qu'ils sont "passifs à basse impédance".
Les HZ sont des micros purement passifs, eux.