66 AC Hi Boost MOD

Activate or deactivate the high frequency boost:

• Y → brighter and punchier sound
• N → softer and warmer sound

Control the high frequencies:

• Low → soft tone
• High → bright and punchy

Controls the mid frequencies:

• Low → scooped, more open sound
• High → full and defined body

Control the low frequencies:

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

Controls the final high frequencies and attack of the sound:

• Low → softer tone
• High → aggressive and cutting tone Ideal for balancing the sound in the mix or with other amps/pedals.

Controls preamp saturation:

• Low → clean
• High → strong natural crunch/overdrive

Controls the overall volume of the amplifier:

• Low → contained and clean sound
• High → greater headroom and controllable saturation

Final volume control:

• Negative → attenuation 0 d
• B → neutral level
• Positive → final signal boost 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.