I have a TRB1005 and I absolutely love the punch of this bass. I have read a lot of reviews and it seems that most of those who replaced the electronic/pickups were not satisfied with the result due to the loss of punch. For sure, keep those alnico pickups they are great and I think they are the same as the TRBJPII. Furthermore it is difficult to find a replacement pickup that has the same size.
Do whatever you want with is it, but here is my advice: Start by replacing the strings with a set of D'Addario XL's. They are the perfect strings for this bass due to the added growl. For some reasons, my bass sounds so much better with them than with DR HiBeams (yet, the Hi Beams are my favorite strings on a Jazz Bass). I find this bass to sound boring and bland with Stainless strings. It's an inexpensive change that can make all the difference. If after that you are still not satisfied, consider changing the preamp for something like an Aguilar OP3. Personally If I am not satisfied with the sound of an instrument I prefer selling it as opposed to investing a lot of money toward an elusive and uncertain result.
Last edited by Frenchy-Lefty : 08-29-2012 at 10:11 PM.