The Citadel captures the feel and tones of early plexis, with that low-mid warmth and top end sparkle. It draws from the Electronic Audio Experiments model feT schema, adapted to the beloved British circuits. While it holds its own as a preamp-style overdrive, because John designed this to mimic both pre- and power amp sections it also works well as a "pseudo amp" toward the end of your chain.
Bright Gain: turn clockwise to add gain from the parallel Bright channel, which is voiced for chime and sparkle. Adds bite to the drive tone at higher settings. The bright channel is fully muted when this control is at zero.
Normal Gain: turn clockwise to add gain from the parallel Normal channel, which has a dark, full-bodied voicing. Higher settings produce a thicker gain sound. The normal channel is fully muted when this control is at zero.
Bass, Midrange, Treble: 3-band FMV (Fender/Marshall/Vox) style tone stack. Moderately mid scooped and relatively subtle in its operation, but decidedly authentic. Most effective at clean to medium gain settings. For a flatter, more traditional pedal voicing, try Midrange at max with the Bass and Treble at zero.
Master: sets overall output volume. This control is capable of high volumes to guarantee loud operation at the cleanest settings. Use judiciously!