Ampeg Superbreverb R-15-R preset

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

The Ampeg Superbreverb R-15-R, first sold as the Supereverb, is a single-channel tube guitar combo related to the R-12-R-B, with a 15-inch Jensen speaker. Three inputs feed a 6SL7 stage with volume and tone; the other 6SL7 half runs tremolo with speed, intensity and a footswitch, and 6SN7 and 7025 stages drive and recover the echo (reverb) unit with a Dimension control. A 6SL7 phase inverter drives two 7591As off a silicon rectifier.

• Made in: USA
• Wattage: 20W
• Channels: 1
• Preamp tubes: 2× 6SL7, 1× 6SN7, 1× 7025
• Power tubes: 2× 7591A

Tags: american, vintage, reverb, tremolo, mid-wattage.

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.