Behringer FBQ3102HD Ultragraph Pro Equalizer

31-Band Stereo Graphic Equalizer for Live and Studio

The Behringer FBQ3102HD Ultragraph Pro delivers 31 bands of precise graphic equalization per channel in a standard 2U rack chassis. Built around ultralow-noise 4580 dual operational amplifiers, the signal path stays clean while engineers get the tonal control they need on stage and in the studio. A Planet Earth switching power supply accepts 100–240 VAC worldwide for noise-free touring. For engineers who want a feature-packed EQ with feedback control at a competitive price, this model is a reliable option.

What Sets This Graphic EQ Apart

Integrating a real-time spectrum analyzer with feedback detection is rare in this price class. The FBQ Feedback Detection System illuminates the LED on the affected fader as soon as a frequency starts to ring. Using the dedicated mono subwoofer output and adjustable 30–200 Hz crossover, the unit becomes a 2-way crossover, removing the need for a separate processor in many PA setups.

EQ Architecture and Signal Quality

With carefully selected low-noise, high-headroom components, audio remains pristine even at extreme EQ settings.

• Frequency Bands: 31 per channel — fine resolution across the full audio spectrum
• Boost/Cut Range: ±12 dB or ±6 dB (switchable) — surgical or gentle shaping per band
• Signal integrity is preserved thanks to 4580 dual operational amplifiers, which ensure ultralow noise in every application.

Feedback Detection and Channel Filters

Live sound setups especially benefit from per-channel filters that clean up the audio before it hits the PA.

• FBQ Feedback Detection: LED on offending fader — instantly identifies the ringing frequency
• High-Pass Filter: variable 10–400 Hz — removes floor rumble, room resonance, and hum
• Low-Pass Filter: variable 2.5–30 kHz — tames hiss and high-frequency noise

Connectivity, Metering, and Rack Integration

Keen attention to connectors and metering simplifies fast setup in racks or touring cases.

• Inputs/Outputs: 2x XLR + 2x 1/4" TRS in, 3x XLR + 2x 1/4" TRS out (servo-balanced)
• Subwoofer Crossover: adjustable 30–200 Hz — built-in 2-way crossover for sub/main PA rigs
• Metering: 12-segment LED I/O meter with clip indicator
• With dimensions of 483 x 150 x 89 mm (19" / 2U) and a weight of 2 kg, the unit is light enough for mobile racks and fly rigs.