So do most people run that switch in the middle position with the Preamp On?
I don't really know. I took the battery out of my fretless L2500, so I run passive only. I think you'll probably find more people who run passive than anything, but I could be wrong. I'd kinda like to have a fretted L2k and keep the preamp in as it does have a really meaty, aggressive quality to it.