The epic BOSS Acoustic Singer Pro Amplifier takes the acoustic stage amp to new heights of sound quality and artistic versatility. Combining BOSS’s most advanced amplifier research, this compact powerhouse delivers rich, vibrant sound with unmatched punch and clarity. Independent channels are provided for acoustic guitar and vocal, and each is equipped with discrete analog input circuits and three-band EQ for studio-quality sound. And with additional features such as Acoustic Resonance, looping, automatic vocal harmonies, effects, and much more, the BOSS Acoustic Singer Pro Amplifier gives acoustic musicians everything they need to deliver inspiring and impactful live performances
Key Features
Professional acoustic amplifier with premium sound and features
120–watt bi-amp design with custom-designed 8-inch woofer and dome tweeter
Dual channels with discrete analog input electronics and three-band EQ
Dedicated guitar channel with Acoustic Resonance to restore natural tone to stage guitars with piezo pickups
Mic channel with phantom power and ¼-inch/XLR combo input for connecting a vocal/guitar microphone or second instrument source
Chorus effect on guitar channel, delay/echo effect on mic channel, and independent reverb on both channels
Harmony function automatically creates smooth and accurate vocal harmonies via real-time key/chord analysis of the guitar input
Built-in looper for practising, developing ideas, and enhancing live performances
Independent anti-feedback controls on each channel
Dual XLR DI jacks assignable to outputting individual channels (direct or post-effects) or both channels mixed together
USB output for direct recording to a computer
Control looper, harmony, and effects with optional footswitches
Natural Sound with Power, Definition, and Presence
Amplifying your acoustic guitar with the ACS Pro is a truly inspiring experience. BOSS engineers worked tirelessly to accurately reproduce the instrument’s fast transient response and natural, three-dimensional feel, and each amplifier element was carefully developed to achieve this. A powerful bi-amp design with extended peak power delivers tight, high-definition sound with ultra-clean broadband frequency response. The custom woofer and dome tweeter feature innovative materials and precision design points that work together to fill the stage with rich, naturally diffused sound. Other fine details include a unique cabinet construction method that eliminates unwanted resonances, and an integrated tilt-back design for maximum projection.
Guitar Channel with Acoustic Resonance
The ACS Pro’s guitar channel features a discrete analog input circuit that provides ample headroom for the quick attack and wide dynamic range of the acoustic guitar. Also included is BOSS’s Acoustic Resonance, which employs advanced processing to eliminate the hard, sterile sound produced by the piezo pickups in most stage guitars. This powerful feature not only enhances the character of your pickup, but also restores the complex natural resonances that are so often lost when amplifying your acoustic. The channel provides a three-band EQ as well, plus a phase switch and notch control for keeping feedback issues at bay. Two types of chorus effects and a guitar-optimized reverb are also on hand to add a finishing touch to your sound.
Mic Channel for Vocals and More
The ACS Pro also includes a dedicated mic channel, giving singing guitarists a compact, all-in-one amplification solution. A discrete analog input circuit delivers full, clear sound, and phantom power is on tap for using studio-grade condenser microphones. There’s also a three-band EQ, phase switch, and anti-feedback notch control, plus top-quality delay/echo and reverb effects to enrich your vocal sound. If you’re using the ACS Pro for guitar only, this channel can alternately be used to mic up your acoustic. For players that use advanced setups, it also works great for blending another amplification source installed in the guitar, such as a second pickup or an internal mic.
Automatic Vocal Harmonies and Looping
A standout feature of the ACS Pro is its vocal harmony function, which creates live harmonies as you sing and play the guitar. It all happens automatically, so there’s no complicated setup needed. Your chord progressions are analyzed in real-time, generating impressive harmonies perfectly tuned to the key of your song. And if you modulate to a new key, the intelligent processing follows along smoothly and accurately. Two different harmony types are available, plus a unison setting that doubles your voice for more impact. The amp’s built-in looper provides even more creative fun, allowing you to build live backing with guitar, vocals, effects, and more.
Advanced Connectivity and Control
The ACS Pro’s rear panel is well stocked for your interfacing needs. Dual DI/Line outputs are provided on XLR connectors, and each features a versatile mode switch for outputting both channels mixed together, or individual channels direct or post-effects. There’s also an aux input with level control, perfect for playing backing music from your mobile device. A USB jack offers a direct computer connection to a DAW, while the Rec/Phones jack provides a standard ¼-inch stereo connection for quiet practice sessions or recording to portable devices. Numerous jacks are also available for controlling the harmony function, looper, effects, and more via optional footswitches.
SPECIFICATIONS
Rated Power Output
120 W (Woofer: 100 W, Tweeter: 20 W)
Nominal Input Level
MIC INPUT: -33 dBu (2.5 k ohms)
GUITAR INPUT: -10 dBu (5 M ohms)
AUX INPUT: -8 dBu (10 k ohms)
Speaker
20 cm (8 inches) Woofer x 1, 2.5 cm (1 inch) Dome Tweeter x 1
Controls
POWER switch
MASTER knob
TWEETER ATT button
MUTE button
[MIC]
PAD button
PHANTOM switch
VOLUME knob
BASS knob
MIDDLE knob
TREBLE knob
ANTI-FEEDBACK knob
PHASE button
DELAY/ECHO knob
REVERB knob
[GUITAR]
PAD button
ACOUSTIC RESONANCE button
VOLUME knob
BASS knob
MIDDLE knob
TREBLE knob
ANTI-FEEDBACK knob
PHASE button
CHORUS knob
REVERB knob
[HARMONY]
ON button
TYPE button
LEVEL knob
[LOOPER]
LOOPER button
STOP/CLEAR button
[AUX]
LEVEL knob
[DI/LINE OUT]
MIC/MIX: OUT SELECT switch
GUITAR/MIX: OUT SELECT switch
Indicators
TWEETER ATT
MUTE
[MIC]
PAD
PHASE
[GUITAR]
PAD
ACOUSTIC RESONANCE
PAHSE
[HARMONY]
ON
HIGH
UNISON
LOW
[LOOPER]
REC
PLAY
OVERDUB
Connectors
MIC jack: Combo type (XLR, 1/4-inch TRS phone type)
GUITAR jack: 1/4-inch phone type
AUX IN jack: Stereo miniature phone type
PHONES/REC OUT jack: Stereo 1/4-inch phone type
DI/LINE OUT MIC/MIX jack: XLR type
DI/LINE OUT GUITAR/MIX jack: XLR type
FOOT CONTROL LOOPER/CHORUS jack: 1/4-inch TRS phone type
FOOT CONTROL HARMONY/MUTE jack: 1/4-inch TRS phone type
GA-FC jack: 1/4-inch TRS phone type
USB port: USB B type
AC IN jack
Power Consumption
50 W
Accessories
Owner’s manual
Power cord
GA-FC sticker
SIZE AND WEIGHT
Width 417 mm
Depth 330 mm
Height 358 mm
Weight 14.5 kg
