Hello everyone, 2 days ago I purchased my first ever bass (yes, I am a beginner), Sire V7 Gen 2 Swamp Ash (5 string). As I was playing the bass at home, without an amp, I noticed the A string was buzzing. It was buzzing when no fret was being pressed on. When I start pressing on the 1st and 2nd frets, the buzzing immediately decreases to a point of becoming inaudible. Throughout the remaining frets, the buzzing remains at a low level, but not none. I tried to adjust the truss rod, saddle heights, but no matter what I did, the open A string was buzzing. Only when I raised the action a lot did the buzzing stop. I also tried to touch the string behind the nut, thinking the problem might be behind this area, but that wasn't the case either. I'm probably missing something, and I am spending these last 4 hours to fix this frustrating problem. If you have any idea what the problem may be, could you please help? Thanks.