The Roland AC-60 Acoustic Guitar Amplifier comes equipped with two specially developed 16-cm (6.5-inch) wide-range speakers. Features stereo output (30 W + 30 W) and housed in a bass-reflex cabinet. Each channel includes a 3-band equalizer. The MIC/LINE channel features phantom power, utilizing highly reliable, dedicated 48 V-output phantom circuitry. Below schematic shows the Roland AC-60 Acoustic Chorus Guitar Amplifier Block Diagram. The diagram shows the interconnection between parts which include: Aux In, guitar input, mic/line input, guitar channel, stereo effect, anti feedback, phones, sub woofer out, speaker, line out and DI Out/ Tuner Out.