Your post got me curious - in a good way - as that's not been my experience with various Stingrays modded for passive, I can always notice a difference in the fundamental of the note. So, I took a look at the specs for the Reflex, seems the passive side has a separate volume and tone pot value to the active side which makes sense, but more interestingly Ernie Ball call it a 'passive pre-amp' - never heard of that before! I wonder if that helps 'balance' the volumes (which I always needed a pedal for), or if the passive pre-amp adds some colour? I'm lost now