I put some Bartolini jazz pickups in my Fender Marcus Miller Sig. First I tried the Bartolini TMB preamp and didn't like it. Now I have the Sadowsky; don't like the sound of this preamp either although it has this "vintage tone" control which sounds good. I'm not sure if the Bartolini's would sound the same if I took out the Sadowsky or if the "vintage tone control" actually affects the sound of the pickups, ie. I'm not sure if the "vintage tone control" is just a passive switch. Anyway, does anyone have an idea for a nice sounding preamp to go with jazz sounding pickups (Bartolini) on a maple necked J bass? Thanks for your input.