Hello to all. I have had these preamps in 2 bases, once in a DP by my request, and now in my Modulus Q6. Since I got my modulus, I have always had problems distorting amps when using only the bridge pickup, and have almost always used the EQ flat specially in the mids as it distorts... I have recently adjusted the gain trim pot in the back, and has helped things somewhat. My question is, how does the gain trim pot work? does it affect the input gain at the input stage of the preamp, or does it affect the volume at the output stage? Also, mine didnt came with an active/passive switch, and I have seen that the diagrams mention a 250K pot for volume control, while mine uses a 25K. How does using a 250K pot affect the volume/tone when in active mode. (I know a 25K pot is useless in a passive pickup situation.) Thanks in advance. And all the information about this circuit will be greatly apreciated.