Settings and controls

Each of the JCM800’s two identical channels features independent Preamp, Bass, Middle, Treble, Presence, and Volume controls, giving you complete command over your gain structure and tonal response.

From dynamic low-gain crunch to saturated high-gain sustain, the JCM800 module delivers every nuance of the original amp’s voice.

Independent Master Volume controls for each channel allow you to precisely balance rhythm and lead levels with all of the amp’s dynamic character and harmonic complexity.

A three-position toggle switch selects between two bright cap values, or remove the cap entirely. This lets you tailor the attack and clarity of the preamp stage, from tight and biting to warm and smooth.

It’s just like modding the bright cap on a vintage 2203, without touching a soldering iron.

Faithfully replicates the dual input jacks found on the original JCM800, toggling between the high-gain “Lead” input and the lower-gain “Normal” input. This lets you instantly move from punchy, classic crunch to saturated modern drive.

The JCM800 module features a three-position switch on the PCB, which allows you to configure the input tube bass response to match the original circuit. These settings affect the feel and tightness.

The switch has three positions:

The module is preset to Position 2. Of course, you're free to experiment with any setting to find what works best for you.