What tubes does the Mesa Boogie Express 5:25 / 5:50 - Clean use?

The Mesa Boogie Express 5:25 / 5:50 - Clean uses 5× 12AX7 preamp tubes and 2× EL84 (5:25) / 2× 6L6 (5:50) power tubes.

When was the Mesa Boogie Express 5:25 / 5:50 - Clean produced?

The Mesa Boogie Express 5:25 / 5:50 - Clean was produced 2007–2012.

Mesa Boogie Express 5:25 / 5:50 - Clean preset

Verified · 93/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Express 5:25 and 5:50 are compact two-channel Mesa/Boogie amps that share one preamp. Channel 1 switches between Clean and Crunch modes and Channel 2 between Blues and Burn, each channel with its own gain, EQ, reverb, master and a footswitchable Contour control. Mesa's Duo-Class power section runs one tube single-ended at 5 watts or both in push-pull: two EL84s for 25 watts in the 5:25, two 6L6s for 50 watts in the 5:50.

Years produced: 2007–2012
Made in: USA
Wattage: 50W
Channels: 2
Preamp tubes: 5× 12AX7
Power tubes: 2× EL84 (5:25) / 2× 6L6 (5:50)

Tags: american, clean, crunch, high-gain, reverb, 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.