Huge fan of ATKs since I got my first one back in 1995, but unfortunately my lack of knowledge of electronics issues has remained at least as constant
You might ask in the
ATK club, but from what little I do know of electronics, I would hazard a hunch that it’s something in combination with that bass rather than the bass itself. Are you singing into a microphone while playing this bass? Wearing shoes? Hopefully someone with some actual knowledge these things will tune in
I will throw a few things out there that probably have nothing to do with this, but just might:
•I love ATKs, but the ‘90s models (and possibly later ones) have finicky output jacks. This generally amounts to an audible crackle through speakers or headphones, though, not anything resembling a physical shock. Removing the plug and reinserting it once generally clears it up.
•My ATK305—and my decades-newer Yamaha BB735A—both very occasionally develop a loud buzz that comes and goes without warning that I suspect has something to do with the ground wires in their respective control cavities, but it goes and mostly stays away for reasons as unknown to me as why it happens in the first place. When this issue is in effect, keeping a bare toe on a pedal eliminates the buzz until I step off. I still have experienced nothing like a physical shock from either instrument. (And their four-string counterparts never do this.)
•The strings that came stock on a Jackson I bought in 2021 literally ripped the hair from my forearm. Any chance that’s what you felt?
I hope you get more helpful replies. The best I can do: this doesn’t sound like a common issue inherent to ATKs.