A high-definition 31-band stereo graphic equalizer with FBQ Feedback Detection System packed with plenty of professional features. The Feedback Detection system instantly reveals critical frequencies and can also be used as audio analyzer. A Planet Earth switching power supply yields noise-free audio, superior transient response, and efficient power consumption. Its ultra-low noise 4580 dual op-amps exhibit excellent sound quality. The limiter on each of the Ultragraph Pro's channels protects your system from overload and distortion. Additional sweepable high and low-cut filters for each channel remove unwanted frequencies e.g. floor rumble, hiss etc and the pink noise generator provides test signals to adapt your sound system to any room acoustics.