66 AC Hi Boost

Control the high frequencies:

• Low → softer tone
• High → bright and punchy sound

Control the low frequencies:

• Low → tighter and more defined
• High → fuller, can become muddy

Controls the high mid frequencies to be attenuated:

• Low → fuller and fuller sound
• High → more scooped and bright tone Useful for reducing nasal or harshness on the high mids.

Control the level of the “bright” channel:

• Low → clean and controlled sound
• High → bright and slightly saturated

Controls the normal channel level:

• Low → clean
• High → natural crunch/overdrive

Final amplifier volume control:

• Negative → attenuation 0 d
• B → neutral level
• Positive → boost of the final signal Does not alter the timbre, only the overall level.

Sync tremolo to preset tempo:

• Y → synced to
• BPMN → free, adjusted in Hz

Tremolo speed (cycles per second):

• 0.5–1 Hz → slow and smooth
• 1–3 Hz → classic and natural
• 3–6 Hz → fast and pulsating
• If
• Sync
• ON → Speed ​​automatically adapts to the preset tempo.

Tremolo depth:

• Low → light effect
• High → strong and pulsating effect

Activate or deactivate the integrated tremolo:

• Y → effect active
• N → effect deactivated
• Useful for adding movement without external pedals.