I'm thinking about replacing the passive pickups in my MIA Jazz bass with EMG-J pickups, and would appreciate any opinions from those who have first-hand experience with these pickups. I used to have these EMG's in another Jazz about 10 years ago, but it's been a while since I've heard them. I recall them having a clean and modern tone, and were particularly great for playing slap. I play everything from funk to jazz to blues to soul, and want to have pickups that cover this territory. Plus, I want the advantages of active pickups (no hum, higher output, extended frequency response, more even volume across strings, etc.). Also, I don't know if I should keep the passive tone control on my Jazz bass, or add active tone controls. Does EMG make active tone controls that fit in the control cavity of a Jazz bass (and also fit on the chrome plate)? I'm familiar with the J-Retro preamp, but don't know if this is compatible. Or could the Aguilar OBP-1 be used with the EMG's? Any opinions or suggestions would be appreciated. Thanks!