I purchased this guy from a California Guitar Center and it came in Tuesday. I brought it into practice and noticed that it was a little "low" so I flipped the switch to toggle between "active" and "passive" only to be greeted by silence. I thought the battery might be dead so I popped off the cover to discover that the preamp and battery compartment had been removed and nothing was left but some exposed wires. So I contacted Hohner asking if they had any leftover electronics lying around, you know, just in case, and they promptly reported that they did not. I've also since written EMG who designed the original pickups, Hohner German as well as Cort who designed the original electronics for the F1 model. What can I do? I would love to play this in it's intended state and don't care if I don't have the stock preamp but would like some solution. I bought this bass with the desire for a complete, active bass. It is only a volume boost after many hours of research but currently, it's not "complete" and I would like it to be that way. If all else fails, I'll consider it a loss and try to return it to Guitar Center but, as you may know, this is not an easy bass to track down.