BOSS Acoustic Singer Pro 120-Watt Acoustic Amplifier with Harmonizer and Looper

The BOSS Acoustic Singer Pro is a 120-watt professional acoustic amplifier featuring dual independent channels for guitar and vocals, built-in vocal harmonies, a looper, Acoustic Resonance processing, and dual XLR DI outputs — making it a complete all-in-one solution for singer-songwriters and acoustic performers who demand studio-quality sound on stage.

For musicians searching for the best acoustic amp for singer-songwriter live performance, the Acoustic Singer Pro eliminates the need for separate vocal processors and PA systems at smaller venues and intimate gigs. The automatic harmony function analyzes your chord progressions in real time and generates pitch-perfect harmonies without any manual setup — a standout advantage over competing acoustic amps with built-in vocal harmonizer features. The built-in looper adds another creative dimension, letting performers build live backing tracks from guitar, vocals, and effects on the fly.

Engineered around a bi-amp design with a custom 8-inch woofer and dome tweeter, the Acoustic Singer Pro delivers broadband frequency response with tight low-end definition and airy high-end clarity. BOSS's Acoustic Resonance processing addresses one of the most common complaints about stage acoustic guitars: the harsh, thin character introduced by piezo pickups. By restoring the natural resonances lost in amplification, the amp ensures your instrument sounds as organic and three-dimensional through the PA as it does unplugged. Independent anti-feedback controls on each channel, phantom power for condenser microphones, and USB output for direct DAW recording round out a feature set built for working professionals.

Key Features of the BOSS Acoustic Singer Pro

• 120-Watt Bi-Amp Design: Delivers powerful, full-range sound through a custom 8-inch woofer (100W) and 1-inch dome tweeter (20W), filling the stage with rich, naturally diffused acoustic tone.
• Acoustic Resonance Processing: Eliminates the brittle, unnatural character of piezo pickups by restoring complex harmonic resonances, so your guitar sounds warm and organic even through amplification.
• Automatic Vocal Harmony Function: Analyzes guitar chord input in real time to generate smooth, accurate vocal harmonies in two types plus a unison doubling setting - no programming required.
• Built-In Looper: Enables live loop building with guitar, vocals, and effects for practice, songwriting, and live performance enhancement - controllable via included footswitch.
• Dual Independent Channels with 3-Band EQ: Separate discrete analog input circuits for guitar and microphone provide studio-grade signal integrity, each with full bass/mid/treble EQ and anti-feedback notch control.
• Dual XLR DI Outputs: Assignable per-channel or mixed output to the PA system, direct or post-effects, giving sound engineers flexible integration at any venue.
• USB Recording Output: Connects directly to a Mac or PC DAW for studio-quality recording without an external audio interface - a genuine workflow accelerator for home recording.

Technical Specifications

• Rated Power Output: 120W total (Woofer: 100W, Tweeter: 20W)
• Speaker Configuration: 8-inch (20 cm) woofer x1, 1-inch (2.5 cm) dome tweeter x1
• MIC Input Nominal Level: -33 dBu (2.5k ohm impedance)
• Guitar Input Nominal Level: -10 dBu (5M ohm impedance)
• AUX Input Nominal Level: -8 dBu (10k ohm impedance)
• MIC Input Connector: Combo XLR / 1/4-inch TRS
• Guitar Input Connector: 1/4-inch phone
• AUX Input Connector: Stereo 3.5mm mini phone
• DI/Line Outputs: Dual XLR (MIC/MIX and GUITAR/MIX, each with output select switch)
• Phones/Rec Output: 1/4-inch stereo TRS
• USB Port: Type B
• Footswitch Jacks: LOOPER/CHORUS (1/4-inch TRS), HARMONY/MUTE (1/4-inch TRS), GA-FC (1/4-inch TRS)
• Guitar Channel Effects: Chorus (2 types), Reverb
• Mic Channel Effects: Delay/Echo, Reverb
• Harmony Types: High, Low, Unison
• Phantom Power: Yes (MIC channel)
• Power Consumption: 50W
• Width: 16-7/16 inches (417 mm)
• Depth: 13 inches (330 mm)
• Height: 14-1/8 inches (358 mm)
• Weight: 32 lbs (14.5 kg)

What's in the Box

• BOSS Acoustic Singer Pro Amplifier
• Dual Footswitch (for looper and harmony control)
• Power cord
• GA-FC sticker
• Owner's manual