The Behringer ULTRAGRAPH PRO FBQ3102HD is a professional high-definition 31-band stereo graphic equalizer with Behringer's proprietary FBQ Feedback Detection System. It is a workhorse tool for live sound engineers and studio operators who need precise tonal control, and a proven choice for PA rigs in churches, venues and events across Kenya. The FBQ Feedback Detection System instantly reveals problem frequencies: when feedback occurs, the LED on the offending fader illuminates so you can pull it down immediately, keeping performances feedback-free. The FBQ circuitry can also double as an audio analyzer for system tuning. Audio quality is handled by ultra-low-noise 4580 operational amplifiers for maximum signal integrity. Each channel includes additional sweepable low-cut and high-cut filters to remove floor rumble, hiss and other unwanted frequencies, while a dedicated mono subwoofer output with adjustable 30-200 Hz crossover lets you integrate a sub properly. Highly accurate 12-segment LED input/output metering and input gain controls make level setting simple, and switchable +/-6 dB or +/-12 dB control ranges cover both fine tuning and corrective work. Key Features: - Professional 31-band stereo graphic equalizer (ISO 1/3-octave bands) - Switchable +/-6 dB or +/-12 dB control range - FBQ Feedback Detection System doubles as audio analyzer - Ultra-low-noise 4580 operational amplifiers - Dedicated mono subwoofer output with adjustable 30-200 Hz crossover - Sweepable low-cut and high-cut filters per channel - Servo-balanced XLR and 1/4" TRS inputs and outputs - Frequency response 10 Hz - 30 kHz; Planet Earth switching power supply (100-240 VAC)