Hi Talkbassists! I own a MIM jazz with barts single coil. There's a guy in my town who makes active onboard preamps, so I have the chance of choosing the frequencies that the pre will boost/cut. My question is: what is the best MIDRANGE "center" frequency for my instrument? I mean wich one will allow me to take the best advantage of my instrument´s natural tone, especially to give me that "jaco" or "victor bailey" bridge sound? I'm thinking about 800hz. I know bart preamps give you the choice of 800. I think SDs work at 650hz. Unfortunatelly I can´t afford a J-retro with vari-mids right now... So, what's YOUR opinion?!?