I recently bought a Dean Edge 4 fretless and the playbility and feel is impressive for $250. But, the sound that comes out of my amp just blows. I'm thinking about swapping the dean pickups for Bartolini's and changing the active preamp to a passive. I was looking at the bartolini's and I didn't see any pickups that fit the Dean (look like the pickups are rather large on the Dean). What involves changing a bass from active to passive? Has anyone done this to a Dean Edge? Thanks!