Behringer Ultragraph Pro Fbq6200 Ultra-Musical 31-Band Stereo Graphic Equalizer With Fbq Feedback Detection System, Dedicated Limiters Per Channel And Pink Noise Generator Professional 31-band stereo Graphic Equalizer for both live and studio applications Revolutionary FBQ Feedback Detection System instantly reveals critical frequencies and can also be used as Audio Analyzer Dedicated limiters with gain reduction meters for each channel protect your sound system from overload and distortion Pink noise generator provides test signals for equalizing your sound system to any room acoustics Highly accurate 8-digit LED input/output metering and input gain control for easy level setting