The BOSS Acoustic Singer ACS Pro redefines what’s possible from a compact acoustic stage amplifier, combining cutting-edge amplifier research with studio-quality sound reproduction. This powerhouse features independent channels for both acoustic guitar and vocals, each equipped with discrete analog input circuits and comprehensive three-band EQ controls. The bi-amp design with extended peak power produces tight, high-definition sound through custom woofers and dome tweeters that fill any venue with rich, naturally diffused audio.
For acoustic guitarists, the ACS Pro captures the instrument’s fast transient response and three-dimensional character with remarkable accuracy. The guitar channel’s discrete analog input circuit provides substantial headroom to handle the quick attack and wide dynamic range typical of acoustic instruments. BOSS’s innovative Acoustic Resonance processing eliminates the harsh, sterile qualities often associated with piezo pickups while restoring the complex natural resonances that make acoustic guitars so captivating.
Singing guitarists will appreciate the dedicated microphone channel, complete with phantom power for professional condenser microphones and comprehensive controls including three-band EQ, phase switching, and anti-feedback notch filtering. Premium delay, echo, and reverb effects enhance vocal performances, while the standout vocal harmony function automatically generates live harmonies based on real-time chord progression analysis. This intelligent processing adapts seamlessly to key changes, creating perfectly tuned harmonies without complicated setup procedures.
- 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



