I have researched all the options. What I am starting to realize it that whether I go with a piezo style bridge like the Ghost system or something like the Roland GK-3B (BTW is my last choice due to being so "out of place" on a bass). They all have preamps. I have an electric 5 string bass that already has a piezo bridge that mixes with the mag signal that is completely passive and works great! This is a completely passive setup but I would consider making it active if I absolutely have to. It currently has a bridge with a pickup in each saddle for each string similar to the Ghost system, but they all run into one final wire that is run in parallel with the magnetic pickups to the jack. I can access each lead wire from each saddle pickup. SO my QUESTION is... Is a preamp'd signal NECESSARY to send the signal out the 13 pin connector?? Couldn't I just wire the leads from the saddles to the 13 pin female connector as needed without having to preamp the signals first??