ULTRACOUSTIC ACX1800 ULTRACOUSTIC 180-Watt 2-Channel Stereo Acoustic Instrument Amplifier with Dual FX and FBQ Feedback Detection s 2 original 8" BUGERA dual-cone speakers for ultimate sound reproduction ACX1800 s Powerful 180-Watt, 2-channel stereo amplifier for acoustic instruments and vocals s 2 integrated, 24-bit digital FX processors each with 16 awesome effects programs including reverb, modulation, delay, and various effects combinations s Revolutionary FBQ Feedback Detection System instantly