Fender Studio Bass preset

Verified · 88/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Studio Bass is a 1970s Fender tube bass head rated at 200 watts RMS. 7025 preamp stages feed a Fender treble/bass/mid stack and a five-band tube-driven graphic EQ with presence and a footpedal EQ control. A master volume feeds a 7025 phase inverter and 12AT7 cathode-follower drivers for six fixed-bias 6L6GCs.

• Made in: USA
• Wattage: 200W
• Channels: 1
• Preamp tubes: 3× 7025, 1× 12AU7A, 1× 12AT7
• Power tubes: 6× 6L6GC

Tags: american, vintage, bass, 6l6, high-wattage, 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.