This does the trick for making the passive Qtr Pound P-Bass and Jazz Bass pickups sing! Great retrofit to my Yamaha BB5000-A.

Picked up this bass several years back at a local pawn shop. The "P-bass" side was DOA but the Jazz side still functioned. As this bass has long been out of production, there was not much help from Yamaha. Tried the "active" pickup version of this system to see if that would help, but it did not. After much deliberation and really wanting to get this bass back in the mix, I opted to upgrade to the SD Qtr Pound 5-string P-Bass and Qtr Pound 5-string Jazz Bridge along with this system. Installation was super easy (great directions from SD). So how well does it work? Like a dream - great tone controls as I can get this thing to get as funky as you want (great pop and snap) or go deep down growl of P-Bass tones. Still working on how to overcome the phase cancellation that happens between the Jazz Bridge and the D-G coil of the P-Bass, but that has nothing to do with the preamp system. It is a great design that works well!

Nice active preamp, I replaced the preamp in a 2006 Fender Mex Pbass special. This is the pbass that fender made with pj configuration pbass body jazz neck. Candy apple red gold pick guard. I bought it as a demo and hot rodded it. I replaced tuners with hip shot hb7s and bridge with the hip shot A style bridge. But the best part was the SD Quarter Pound PJ set I replaced with the existing fender preamp. Sounded good but pots started to get a little noisy and midrange pot barely worked. So to sum at that up I decided to Erie place the fender preamp with STC3p and let me tell you first of all the QT Pounders are amazing but after adding the stc3p, another level my friends. Smooth pots quiet like a whisper to a scream this bass I will put up against any American deluxe, elite ,or ultra pbass fender makes and this bass will holds its own. No question great preamp but get a set of SD pups with it and you can’t go wrong. Peace! Nd

Excellent customer service and product! Thanks!

Installed the Active Bass Preamp in my Rogue Series III - 6 string bass. Super simple install, I had to drill a new hole for the 1/4" jack, but I prefer having it where it is as opposed to the original. Used a couple pieces of black tape to isolate/insulate it, but it fit inside the existing area, including the battery. Total time less than four hours, but I was in no hurry. I think the guitar is quieter when you let go of the strings than it was originally also. I searched the FAQs, but could not find an approximate battery life. Any clue to how long a fresh battery would last under continual use would help.