High-Definition 15-Band Stereo Graphic Equalizer with FBQ Feedback Detection System. Professional audio engineers have known for decades that a good EQ makes all the difference in how a performance is perceived. Although multi-band graphic equalizers have been around for a long time, they have changed very little… until now! The ULTRAGRAPH PRO FBQ1502HD takes the graphic equalizer into the realm of high-definiton audio, providing robust features and our proprietary FBQ Feedback Detection System – at a price that makes them a must-have for anyone who records or operates a live sound system. Imagine the audio frequency range as a very wide highway with lots of “lanes”. Each of these lanes represents a specific frequency band. For more than 20 years, BEHRINGER has designed and manufactured some of the most successful FBQ Feedback Elimination processors. Now you can own and enjoy the benefits of this technology, as we have integrated the revolutionary FBQ Feedback Detection System into this product, so your sound system is completely feedback-free, allowing you to focus on your performance. Utilizing an ultra-fast feedback detection system, this ingenious circuitry helps you recognize and tame feedback frequencies immediately. When feedback is sensed in a specific frequency range, the LED on the associated EQ fader illuminates, showing you at a glance which fader to lower to overcome the feedback. That simple! The high-definition FBQ1502HD provides superb, ultra-low noise performance thanks to top-notch German engineering, and the use of highest-quality components. Industry-leading 4580 dual operational amplifiers are employed throughout for the utmost signal integrity across the entire audio spectrum. With 15-bands of smooth and precise equalization per channel, the stereo FBQ1502HD adds the finishing professional touch to your recordings and live shows. Features Professional 15-band stereo graphic equalizer for live and studio applications Revolutionary FBQ Feedback Detection system instantly reveals critical frequencies and can also be used as audio analyzer Ultra-low noise 4580 operational amplifiers for highest signal integrity Dedicated mono subwoofer output with adjustable crossover frequency Additional low-cut filter removes unwanted frequencies, e.g. floor rumble Highly accurate 4-segment LED output metering and input gain controls for easy level setting Servo-balanced inputs and outputs with 1/4" TRS and gold-plated XLR connectors "Planet Earth" switching power supply for maximum flexibility (100 - 240 V~), noise-free audio, superior transient response plus low power consumption for energy saving