Tube Preamp (12AX7) Cathode-Bypass Knee & Power-Amp Presence/Resonance NFB Loop Designer

Deterministic Small-signal triode Miller-capacitance & cathode-degeneration transconductance transfer H(s) + closed-loop power-amp NFB Bode plot engine (.svg, .pdf, .json) built for Marshall, Soldano, Friedman, Electro-Harmonix — zero-upload ephemeral Wasm RAM execution.

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