Boss ACS Acoustic Singer Pro, Acoustic Guitars & Vocal Amps, Professional acoustic amplifier with premium features, 120 Watt Bi-Amp design, Loudspeaker configuration: specially developed 8-inch woofer and tweeter, 2 Independent channels with discrete analog input circuit and 3-band EQ, Guitar channel with ""Acoustic Resonance"" to make the sound of piezo pickups sound more natural, Microphone channel with phantom power, XLR/jack combo connector, Chorus-FX for guitar channel, Delay/Echo-FX for microphone channel, Additional delay/echo FX for both channels (independently controllable), Harmony function automatically creates vocal harmonies by real-time key/chord analysis at guitar input, Integrated looper, Independent anti-feedback controls for each channel, 2 XLR DI sockets for output of the individual channels (either directly or after the effects section) or of both channels, USB port for direct recording to a connected computer, Looper, harmony and effects can be controlled via optional foot switches, Dimensions (W x D x H): 417 x 330 x 358 mm, Weight: 14.5 kg