What tubes does the Leslie 145 use?

The Leslie 145 uses 1× 12AU7 preamp tubes and 2× 6550 power tubes.

Who famously used the Leslie 145?

Kevin Comeau are among the notable players associated with the Leslie 145.

What recordings feature the Leslie 145?

Starlifter: Fearless Pt. II by Crown Lands (2023).

Leslie 145 preset

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

The Leslie 145 amplifier drives a Leslie rotary speaker cabinet for organs, not a guitar amp. It is a tube amp with a 12AU7 driver into a pair of 6550s rated around 40 watts, with an OC3 voltage regulator and a solid-state bridge rectifier. Organists pair the 145 with Hammond organs, and guitarists sometimes run through Leslie cabinets for the swirling rotary sound.

Made in: USA
Wattage: 40W
Channels: 1
Preamp tubes: 1× 12AU7
Power tubes: 2× 6550

Known for: Kevin Comeau.

Heard on: Starlifter: Fearless Pt. II — Crown Lands (2023).

Tags: american, vintage, 6550, clean.

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.