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Boss ACS-LIVE Acoustic Singer Live Combo

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The Acoustic Singer Live 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 Live 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 Live 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 Acoustic Singer Live’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 Live 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 Live 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 Acoustic Singer Live 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.

  • Professional acoustic amplifier with premium sound and features
  • 60–watt bi-amp design with custom-designed 6.5-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 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
  • Rated Power Output - 60 W (Woofer: 50 W, Tweeter: 10 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 - 16 cm (6.5 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
  • - VOLUME knob
  • - BASS knob
  • - MIDDLE knob
  • - TREBLE knob
  • - ANTI-FEEDBACK knob
  • - PHASE button
  • - CHORUS knob
  • - REVERB knob
  • - ON button
  • - TYPE button
  • - LEVEL knob
  • [LOOPER]
  • - LOOPER button
  • - STOP/CLEAR button
  • [AUX]
  • - LEVEL knob
  • - MIC/MIX: OUT SELECT switch
  • Indicators
  • - MUTE
  • [MIC]
  • - PAD
  • - PHASE
  • [GUITAR]
  • - PAD
  • - PHASE
  • - ON
  • - HIGH
  • - UNISON
  • - LOW
  • [LOOPER]
  • - REC
  • - PLAY
  • 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 - 40 W
  • Accessories
  • - Owner's manual
  • - Power cord
  • - GA-FC sticker
  • - Footswitch
  • Options (sold separately)
  • - Footswitch: FS-5U, FS-6, FS-7
  • - Expression pedal: FV-500L、FV-500H、Roland EV-5
  • Width - 367 mm, 14-1/2 inches
  • - Depth - 274 mm, 10-13/16 inches
  • - Height - 314 mm, 12-3/8 inches
  • - Weight - 10.5 kg, 23 lbs 3 oz
  • * 0 dBu = 0.775 Vrms



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GAK.CO.UK LTD is registered in England and Wales 04578270. Registered office: 30 - 34 North Street Hailsham East Sussex BN27 1DW GAK.CO.UK LTD acts as a credit broker and only offers credit products from Secure Trust Bank PLC trading as V12 Retail Finance. GAK.CO.UK LTD is an appointed representative of The Guitar Amp and Keyboard Centre Limited which is authorised and regulated by the Financial Conduct Authority. GAK.CO.UK LTD FCA registration number is 731400. The Guitar Amp and Keyboard Centre Limited FCA registration number is 684977. Credit provided subject to age and status

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Customer reviews

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  • Paul


    Nice solid little amp. Not yet put it through the rigors of performance.

  • Leslie fuller


    Stunning amp

  • Debra


    Does everything I need it to do and more. Portable and classy looking as well.

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