Calrad SA-30 preset

Verified · 84/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Calrad SA-30 is a small tube stereo integrated amplifier with identical left and right sides. Each side has a 12AX7 volume stage and a bass and treble network, then the triode sections of its 6BM8s act as amplifier and split-load phase inverter for a push-pull pair of 6BM8 pentodes, with negative feedback and 4, 8 and 16 ohm taps. A balance control sets the two sides, and a full-wave tube rectifier supplies about 280 V.

Tags: vintage, stereo, clean.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.