hey guys need some info i have tone pump with emg hz's get that buzz its not consistence only some times I've copper sheilded every thing and connected with ground wires from cavity to cavity .. i really like the tone I'm getting and want to keep it stock if at all possible. is there a issue with that system or is this rare.. i really like the bass it plays like a charm for a 5 string great neck great fret board great sound .. just getting that passive buss from time to time .. any help would be great thanks in advanced.... Jon