The amplifiers that made electric guitar — as clean KiCad schematics, simulation-checked netlists, and structured metadata, built in the open. No scans: every circuit is redrawn from the underlying facts. A verified badge means the netlist landed inside the published voltage chart in CI; drafts are published with the blocker named. Free forever, CC-BY-SA. New here? Start with what this is, what it proves, and how to contribute.
The archive is more than a circuit index. These are the surfaces that show how the circuits connect, and what the knobs actually do.
Every documented circuit, grouped by the line it belongs to, oldest era first. The history tier places each line's other models; contributions welcome.