I plug the ZAM on a 5-string Sadoswky, a “Jaguar“ Fender, a 5-string Blade and a 5-string Yamaha of the BB series.

No alterations were required on these instruments and everything works smoothlessly in 9 volts. Once, on some bass, I had to unscrew the cover to replace the battery.

The dynamics and the quality of low notes are very impressive, I rely less on the equalizer and I no longer need to unplug my bass to spare the battery.