Behringer FBQ3102HD 31-Band Stereo Graphic Equalizer

The Behringer FBQ3102HD is a dual-channel, 31-band graphic equalizer built around ISO-standard frequency centers ranging from 20 Hz to 20 kHz. Each channel features individual sliders with integrated LEDs that serve double duty as part of the FBQ Feedback Detection system — a feature that visually highlights frequencies prone to feedback in real time. This makes the unit particularly valuable in live sound scenarios where quick identification and suppression of problem frequencies can prevent disruptive feedback loops. The same LED display also functions as a basic audio spectrum analyzer, giving engineers a visual read on the frequency content passing through the unit.

Beyond its 31 bands of adjustment per channel, the FBQ3102HD includes sweepable high-cut and low-cut filters on each channel, enabling operators to roll off unwanted low-end rumble or high-frequency hiss before the signal reaches the graphic EQ stage. A dedicated mono subwoofer output with an adjustable crossover point adds further routing flexibility, making it easy to split bass content to a dedicated sub without external processing. The unit accepts both XLR and 1/4" TRS balanced inputs, connects via servo-balanced outputs, and relies on ultra-low noise 4580 operational amplifiers to keep the signal path clean. Housed in a standard 19-inch rack-mount chassis, it fits into professional rigs for both touring and fixed installations.