Music Man RD 65 / RD 100 (GD-2A) - Clean preset

Verified · 92/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The GD-2A is a 1980 revision of the chassis inside Music Man's RD (Reverb/Distortion) amps, drawn for 65- and 100-watt versions. An all-op-amp preamp with Hi and Lo inputs, Bright and Deep switches and Treble, Bass and Mid feeds a footswitchable distortion path with its own Gain and Volume beside the clean Volume. Spring reverb, two line outputs and transistor drivers feed a pair of 6L6GC output tubes with a 4/8-ohm switch.

• Made in: USA
• Channels: 2
• Power tubes: 2× 6L6GC

Tags: american, vintage, hybrid, two-channel.

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.