Selmer Treble 'n' Bass 50 SV - Bass preset

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

The 50-watt 'S.V.' Treble 'n' Bass head from Selmer, with bass and normal channels, an echo send and return, and a standby switch. ECC83 preamps drive a long-tailed pair and two EL34s from a solid-state bridge rectifier. This version has no reverb. It gives a gritty British EL34 crunch at a more manageable volume than the 100.

• Made in: UK
• Wattage: 50W
• Channels: 2
• Preamp tubes: ECC83
• Power tubes: 2× EL34

Tags: british, vintage, el34, mid-wattage, crunch, two-channel.

Schematic-derived preset files for the Neural DSP Quad Cortex and 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.