[quote name='Rich' timestamp='1462180078' post='3040773']
As I said above -- if you take out the existing preamp, you're left with what is effectively a knobless passive Jazz bass that happens to have a battery box (well, 2) already fitted. In theory, it will take any preamp that will fit in a standard Jazz cavity.
[/quote]
Thanks for that.
I guess I need to play round with the EQ a bit more. I noticed quite a big quality jump in overall tone and sound when on a gig playing between this and my USA Fender Jazz select active 4 string. It might be cheaper to go out and get a sadowsy preamp pedal and play the Sire in passive mode. I'm not saying the preamp isn't good, just couldn't really dial in a tone I was completely happy with.