hey i was wondering if anyone has or knows about installing an Active/Passive Switch with their obp3? i seen the option at bestbassgear.com i have a modulus with a single lane poor MM pup and an obp3 pre. im pretty sure the pup is passive.. if not then i guess this isnt possible to begin with? also.. when in passive mode will i only be able to control the volume? or is there a way to control the tone still?