Boss AD-2 Acoustic Preamp Pedal

Boss AD-2 Acoustic Preamp is an advanced sound processor for performing live with acoustic-electric guitars. Housed in the familiar compact pedal chassis, the AD-2 features an Acoustic Resonance effect that recreates the complex tonal characteristics of an unplugged acoustic, plus a high-quality reverb optimized for acoustic guitar performance. The pedal also includes stage essentials like a notch filter for feedback reduction, a balanced DI output, and more.


Acoustic-electric guitar preamp with advanced BOSS sound processing

Sophisticated under-the-hood processing with multiple interlocked parameters, accessible with simple stompbox controls

Acoustic Resonance reproduces the complex resonance characteristics of an unplugged acoustic

Ambience knob provides wide-ranging, studio-quality reverb optimized for acoustic guitar

Notch filter for instant feedback reduction

Normal output for an acoustic guitar amp and balanced DI output for direct PA connection

Sound mute function for switching guitars and tuning on stage


Nominal Input Level: -20 dBu

Input Impedance: 10 M ohms

Nominal Output Level:
OUTPUT jack: -20 dBu
LINE OUT jack: -20 dBu

Output Impedance:
OUTPUT jack: 1 k ohm
LINE OUT jack: 600 ohms

Recommended Load Impedance:
OUTPUT jack: 10 k ohms or greater
LINE OUT jack: 600 ohms or greater

Bypass: Buffered bypass

Pedal switch
NOTCH knob

Indicator: CHECK indicator (Serves also as battery check indicator)

INPUT jack: 1/4-inch phone type
OUTPUT jack: 1/4-inch phone type
LINE OUT jack: 1/4-inch TRS phone type
DC IN jack

Power Supply:
Alkaline battery (9V, 6LR61) or Carbon-zinc battery (9V, 6F22)
AC adaptor (sold separately)

Current Draw: 55 mA

Expected battery life under continuous use:
Alkaline: Approx. 6 hours
* These figures will vary depending on the actual conditions of use.

Owner’s manual
Leaflet (“USING THE UNIT SAFELY,” “IMPORTANT NOTES,” and “Information”)
Alkaline battery (9V, 6LR61)

Option (sold separately): AC adaptor (PSA series)

Width: 73 mm; 2-7/8 inches

Depth: 129 mm; 5-1/8 inches

Height: 59 mm; 2-3/8 inches

Weight (including battery): 450 g; 1 lb

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