Behringer Ultratone K3000fx Ultra-Flexible 300-Watt, 4-Channel Pa System/Keyboard Amplifier With Fx And Fbq Feedback Detection Ultra-flexible 300-Watt 4-channel PA System / Keyboard Amplifier Powerful 15' BUGERA woofer and custom-made 1' driver for ultimate sound reproduction Revolutionary FBQ Feedback Detection System instantly reveals critical frequencies Additional XLR mic input on Channel 1 for direct connection of dynamic microphones Balanced stereo XLR DI with Ground Lift switch for direct connection to your mixing console