[quote name='BigRedX' timestamp='1430730449' post='2763991']
I used to have one fitted to a Squire VMF Jazz. It's OK I supposed but it didn't really do anything that I couldn't already do with the tone controls on my BassPod. Also fitting it required routing out another couple of mm from the depth of the control cavity and then having to re-shield everything.
IMO too much hassle for no appreciable gain, but then I'd have probably said the same about any of the similar pre-amps available for the J-Bass. I personally can't see the point of fitting something in your bass that doesn't really do anything more than you should already be able to do elsewhere in your signal chain.
[/quote]i tend to agree with BRX. an external preamp is a better, cleaner, less hassle option. i have fitted 3 J retros, and i had battery fitting issues, grounding issues, lots of buzzing. they are fantastic preamps, but after a while the hassles involved over take the pro's. keep your instrument original, maybe get a Sadowsky, or an Aguilar external preamp and save yourself the bother.or a Bass Pod.