Carlsbro 60 TR / 60 TR Twin - Bass preset

Verified · 87/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The 60 TR and 60 TR Twin share one 60-watt valve circuit with Bass and Treble channels. The Treble channel has transistor-driven spring reverb with a footswitch and a Top Cut control, and an ECC83 lamp/LDR tremolo adds speed and depth. Two fixed-bias EL34s provide the power.

• Made in: UK
• Wattage: 60W
• Channels: 2
• Preamp tubes: 4× ECC83
• Power tubes: 2× EL34

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

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.