What tubes does the Selmer Bassmaster 50W use?

The Selmer Bassmaster 50W uses 3× ECC83 preamp tubes and 4× EL34 power tubes.

When was the Selmer Bassmaster 50W produced?

The Selmer Bassmaster 50W was produced 1966–1970.

Selmer Bassmaster 50W preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Selmer Bassmaster 50 was a serious bass head built for the demands of larger venues, producing 50 watts from a quartet of EL34 output valves. Its tone stack offered meaningful bass and treble shaping, and the circuit's inherent headroom kept low-frequency notes clear and defined. It represented Selmer's most capable bass offering before the company wound down amplifier production.

Years produced: 1966–1970
Made in: UK
Wattage: 50W
Channels: 1
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.