If you’d like a real explanation of how GK serial numbers work (date codes, prefix meanings, etc.) rather than a story, just let me know.
Marco hadn’t touched a bass in four years. Not since the tour that broke his band—and nearly broke him. But when his uncle passed away and left him “that old GK stack in the garage,” Marco figured he’d sell it. Vintage gear was going for stupid money.
For 1x15, 2x10, 4x10, or 8x10 speaker cabinets, look for a stamped sheet of metal on the back (usually the jack plate) or a handwritten date/serial inside the cabinet near the wiring harness. Warning: Do not open a powered cabinet if you aren’t a tech.