Hey. This is my first posting so please help me out. I have a Yamaha TRB6(old model, more than at least 6 years old). Unfortunately, neck pickup gone dead a while ago. I ordered a pair of Bartolini G6 and installed them myself(I have no idea about electronics at all..I just cut the wires from the old pickups and connected). I got some sound, but not the right sound. Output level was too weak so I turned the trim pot all the way up to compensate. It helped a bitr but still the total output level was weaker than the one from the stock Yamaha pickups. Also, there was too much hiss; it was not tolerable from the monitors. I even got a very dissapointing comment from a recording engineer worked with(he thought it was a really weird bass sound). :scowl: Today, I brought my bass to a local repairshop and the guy was willing to help me(even though I was bothering his late lunch), however, he doesn't look like he really understood the problem. He pluged my bass into a big cabinet and played a couple of notes really loud and said this bass is one of the most quiet bass...duuuhhhh. He even showed me one of the shop's basses which had really big noise problem and tried to assure that my bass was alright. He said most of the preamps have the relatively same amount of hiss and mine was in a good shape. But, I came back to my place and tested again through my Mackie mixer/Samson monitor and the hiss was so obvious. I A/B tested with my other bass(Nordstrand NJ4 Deluxe) and that bass was dead quite while there was a big hiss coming out of my TRB(feels like an ocean). There was a huge difference. Actually it doesn't even need A/B test. Now I cannot trust the only repairshop in my town(as far as I know), I don't expect much from the Guitar Center. That why I need your help. Does anybody know what causes the problem?? Does Bartolini G6 go along with Yamaha stock preamp?? Or I just wired them wrong?? Should I simply replace the whole electronics?? (in this case, I will get a prewired one rather than bring it to that repair guy) Any thoughts will be welcomed.