Hi & happy new year to all over the world! I have a custom Odyssey bass with 2 sopbars Bartolini. The preamp of my bass uses 2X9V batteries. So I'm thinking to change the pickups with Nordstand or Delano (I have not decide yet). Does the voltage of the preamp affect the pickup or it doesn't matter? I mean if the voltage of the preamp should be compatible with the pickup or I can use any kind of pickup?