I have had a MIJ Fender Jaguar bass (with two jazz pickups) laying around for a few years. never played it with the OEM pre, because when switched on, it delivers an ear-piercing screech and oscillation. Something is obviously wrong with it. Because of the bad preamp I am planning to replace it with something else, and was thinking Aguilar. I'm confused as to which Aguilar pre is either, most appropriate, or desired, for this particular bass. OBP-1, 2, or 3. Any thoughts?