So I have an FBB custom bass with an aguilar OB-3 pre-amp and Nordstrand NJ4SE pickups (which are the a modern sounding signle coil). Ever since I got the bass, the pre-amp has been a little noisy. I brought it back to Matt from FBB a few times, and he made it alot better, but he still couldn't fix the problem completely. I played a few other basses with aguilar preamps, but none of them had noise like this. Another problem I've had is that this bass is very quiet compared to my two other basses. I have a six string FBB with Nordstrand DC pickups and a bartolini NTMB preamp, and a fender american deluxe with stock electronics, and both of these basses are literally twice as loud as my FBB with the aguilar pre-amp. I know that Matt tried really hard to fix the problem, but its still there. I really want to fix this problem because, other than this problem, this bass is absolutely amazing. Any suggestions? Should I go with a new preamp? If so I was thinking another Bart NTMB, or maybe even a Demeter preamp. New pickups maybe? I really could use some advice and suggestions.