Hi there everyone, I recently contacted the tech support at Aguilar concerning a buzz that was coming from the amp. The guy told me it probably was due to the 12AX7 tube. I'm also having a growl in my sound borderline to farting or overdrive. This curiously happens when playing hard when fingering near the nut but not so much when playing a C on the E string for exemple. The bass is very present throughout though. Could this also be because of this tube? Or is it just the usual growl of the SR5? Thanks.