Bass buzzes only when active not passive

[xdanxx]

My bass only buzzes when im going active and through my preamp, but is silent when I hit the passive switch. Is this more likely a shielding issue or some sort of ground possibly soldered wrong on the preamp?

 

[Growly Lytes]

Could be wire issue but some Active Preamps buzz no matter what you do.Shielding it properly will help.