So I recently got an old Tobias (1988). The pre had been changed to a Sadowsky, and since it was done in the Sadowsky shop, I figured it was wired OK. However, I wanted to try a Bart pre rather than the Sadowsky, so I got an NTMB 9v. to put in. The Sadowsky has a 500k ohm blend pot, and attached to it were two wires coming from what I believe is the original buffer in this bass, a Bartolini DTA-1. So when I wired in the NTMB, I hooked these wires to the Bart blend pot, which is 250k. Sounds great to me. But here's my question: before I got the NTMB, I called Bass Central and asked Grasshopper, who is apparently knowledgeable about such things, if I could get a preamp that would be comparable to the original pre in this bass, and I also asked him if the original was a TCT or what. He said that it could have been either a TCT or NTMB, but what was important was the buffer. He didn't really elaborate much except to say that Mike Tobias used Bartolini stuff which was customized specifically for him, and wasn't available to the general public. So what's this buffer all about? Is it really an important part of the "Tobias sound" or what? Incidentally, I did a search and read many of the posts having to do with buffers, and I'm still somewhat confused.