To me, it has a combination of Sadowsky Tube-Like Warmth (TM) in the pre, and a little bit of Ken Smith's basses and, to my ears at least, a wee bit of Musicman. That and the neck pickup sound is a lot closer to true PBass territory than a Jpup or a soapbar in J-position. To my ears at least.
For the sake of lunacy could you please please not hit all my GAS buttons at the same time !!!! Dang!
