I am getting an amplified buzz from my set up. This buzz is coming from both amplifiers I own (GK 150, GK 700rb & 410 neo)- leading me to believe the problem is with the pickup (Fishman Full Circle) The buzz is very bad when I run the bass straight into the amp. When I add fdeck's HPF series 3 the buzz is slightly tamed in the lower notes, but still present- especially on the attack of the notes. The buzz is still persistent on the G and D even with the HPF on. I purchased a new RCA to 1/4, troubleshot half the pickup the buzz is still there. I have tried to open the full circle, but two of the screws are really stuck on there. I thought I tamed the problem with the HPF, but I think I was just fooled by the mild taming of the low notes. With the amp at a higher volume level, it was apparent the buzz was not gone. It was very prevalent open G up to B. Do you think the buzz could be coming from anywhere other than the pickup? THANKYOU for your response! I have gigs coming up that I must fix this asap, I am about to pull the trigger on a Realist, but it'd hate to do it and have the problem be something I overlooked.