Fender Rumble 15 preset

Verified · 90/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Rumble 15 is a small solid-state Fender bass practice amp; its service diagram is dated 2003. A single input feeds an op-amp preamp with Volume and a three-band Low, Mid and High EQ. Stereo CD inputs let you play along with recordings, and an OTA-based limiter protects the TDA2050 chip power amp, which drives an 8-ohm speaker. A headphone jack mutes the speaker for quiet practice.

• Wattage: 15W
• Channels: 1

Tags: bass, solid-state, practice, low-wattage, american.

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.