What tubes does the Selmer Treblenbassmkiii use?

The Selmer Treblenbassmkiii uses 3× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Selmer Treblenbassmkiii produced?

The Selmer Treblenbassmkiii was produced 1967–1971.

Selmer Treblenbassmkiii preset

Verified · 85/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Treble 'n' Bass Mk III was the third-generation evolution of Selmer's signature amplifier concept, incorporating refinements to the tone circuit and power supply over earlier versions. By the Mk III, the design had been honed through years of professional feedback into a more consistent and reliable product. It maintains the dual-voiced approach that distinguished the Treble 'n' Bass series from simpler British competitors.

Years produced: 1967–1971
Made in: UK
Channels: 2
Preamp tubes: 3× ECC83
Power tubes: 4× EL34

Tags: british.

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.