Boss Acoustic Singer Pro Acoustic Guitar Amplifier

Conquer any bookstore or coffee shop with this 120-watt acoustic amp. With plenty of power on tap, your vocals and guitar with shine with plenty of headroom.

The Boss Acoustic Singer Pro takes the acoustic stage amp to new levels of sound quality and creative versatility. Incorporating BOSS's latest advancements in amplifier research, this compact powerhouse produces 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 Acoustic Singer Pro gives acoustic musicians everything they need to deliver inspiring and impactful live performances.

Natural Sound with Power, Definition, and Presence

Amplifying your acoustic guitar with the Acoustic Singer 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

read more The Acoustic Singer 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 Acoustic Singer 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 Acoustic Singer 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 Acoustic Singer Pro is its vocal harmony function, which creates live harmonies as you sing and play 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 Acoustic Singer 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 1/4-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.


- 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 1/4-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 practicing, 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
WARNING: Cancer and Reproductive Harm -
read less

- 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

- PAD button
- PHANTOM switch
- VOLUME knob
- BASS knob
- MIDDLE knob
- TREBLE knob
- PHASE button
- REVERB knob

- PAD button
- VOLUME knob
- BASS knob
- MIDDLE knob
- TREBLE knob
- PHASE button
- CHORUS knob
- REVERB knob

- ON button
- TYPE button
- LEVEL knob\0x2028[LOOPER]
- LOOPER button
- STOP/CLEAR button

- LEVEL knob\0x2028[DI/LINE OUT]
- Indicators:

- 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
- 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
- Options: (sold separately)
- Footswitch: FS-5L, FS-6, FS-7
- Expression pedal: FV-500L\0x3001FV-500H\0x3001Roland EV-5

Size and Weight:
- Width: 417 mm, 16-7/16"
- Depth: 330 mm, 13"
- Height: 358 mm, 14-1/8"
- Weight: 14.5 kg/ 32 lbs oz
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 36 lbs
Shipping Dimensions: 20 x 17 x 15 in
Manufacturer Part Number (MPN): BOS ACSPRO

For support or warranty questions, please contact the manufacturer:
Phone: 323-890-3700

Reviewers gave this product an overall rating of 10 out of 10 stars. (1 ratings)
Submitted July 6, 2019 by Jeff B in Westerville, OH
"Fantastic Sounding Amp!! Great Quality!!"
Overall: 10 out of 10 stars
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I've been playing and singing for 40+ years just for fun. I grew up with a singing Father (country music) and he taught me how to play. I have always played for friends and have played at parties and even a wedding. Recently I decided to upgrade my equipment and started looking at multiple amps in this range. I have the Roland AC-60 and love it but I wanted something with more power so I didn't have to mic through a PA. I went to a local music store and tested the Fishman (180 watts) and loved it. Then I played through the Boss ACS Pro and fell in love with it's sound and it's options. Luckily one of the employees at the store gigs and has one so he took me through all of it's options and abilities. With the touch of a Boss FS-6 pedal you can literally become a one man band. It has all the great features and sound other acoustic amps in this category have except it adds a Harmonizer and a built in Looper. I was blown away. The Pro pushes out 120 watts which is more then enough power for me. It's not much bigger then my Roland AC-60. I tested it outside on our deck when we had a small party and it was perfect. All my friends were blown away at how great it sounded and more importantly how good it made me sound. Roland, Fishman, and many others make great sounding amps, but for my needs and the options it offers I absolutely had to have it. Thank you zZounds for making it possible.
Musical Background:
I have played the acoustic and the electric guitar since I was about 8-9 years old. Just play at home now.
Musical Style:
Rock, Country, Christian
12 of 14 people (86%) people found this review helpful. Did you?
Thanks for your opinion!