BOSS’s COSM Acoustic-Modeling technology is beautifully showcased in this small but powerful pedal, which simulates an acoustic guitar much more precisely and realistically than previous technology allowed. Derived from BOSS top-of-the-line AD-8, the AC-3 simulates the sound of an acoustic guitar with incredible precision. Four simulation modes are provided: Standard, Jumbo, Enhanced, and Piezo-equipped; the latter supplies that famous “cut through the mix” direct piezo sound. Previous compact acoustic-guitar modeling-pedals were promising, but now the bar has been raised with AC-3.
Nominal Input Level
1 M ohms
Nominal Output Level
1 k ohms
Recommended Load Impedance
10 k ohms or greater
Pedal Switch, MODE Switch, BODY Knob, TOP Knob, LEVEL Knob, REVERB Knob
CHECK Indicator (Serves also as battery check indicator)
INPUT Jack, G.OUT Jack, LINE OUT Jack, AC Adaptor Jack (DC 9 V)
DC 9 V: Dry Battery (6F22/ 9 V), AC Adaptor (PSA Series: Optional)
39 mA (DC 9 V)
Owner's Manual, Dry Battery; 6F22/ 9 V (Carbon), Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”)
AC Adaptor PSA-Series
Size and Weight
70 mm2-13/16 inches
125 mm4-15/16 inches
55 mm2-3/16 inches
440 g1 lbs.
All specifications and appearances are subject to change
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