BEHRINGER ULTRACOUSTIC ACX450 Powerful 45-Watt, 2-channel amplifier for acoustic instruments and vocals Original 8" BUGERA dual-cone speaker for ultimate sound reproduction 2 integrated digital FX processors each with 16 awesome effects programs including reverb, modulation, delay, and various effects combinations Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies 2 dedicated instrument and microphone channels with separate Gain and FX controls