Behringer

Behringer FBQ1502 ULTRAGRAPH PRO 15-Band Graphic Equalizer

Tame feedback before it ruins your set and sculpt your mix with surgical 15-band stereo EQ built for stage and studio.

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Overview

The Behringer ULTRAGRAPH PRO FBQ1502 is built for one of the most frustrating jobs in live and studio audio: getting control of a mix before a room, a monitor system, or a bus gets away from you. The 15-band stereo configuration gives you enough frequency resolution to address the honky 400Hz buildup in a small venue, the harsh 3kHz that fatigues ears on a long show, or the low-mid muddiness that accumulates in studio mix buses. What separates this unit from a generic graphic EQ is the FBQ Feedback Detection System — a real-time analyzer that illuminates the specific bands approaching feedback, turning reactive mix management into something you can actually see and respond to before the PA rings out.

Physically, the FBQ1502 is a solid 2U rack unit with a dense complement of sliders and a clear LED meter section. The shielded toroidal power transformer is a genuine engineering choice that pays dividends in noise — you won't hear the telltale hum that cheaper transformers introduce into sensitive signal chains. The dedicated mono subwoofer output with its adjustable crossover makes it a practical all-in-one solution for engineers running bi-amped live systems or needing discrete sub routing in a studio setup. For touring engineers looking for a reliable, feature-rich EQ that won't embarrass them on a professional stage, or for project studio owners who need a quiet, functional insert EQ, the FBQ1502 punches well above its price.

Key Features

Professional 15-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 mono subwoofer output with adjustable crossover frequency

Ultra low-noise audio operational amplifiers offer outstanding sound performance

Shielded toroidal power transformer for ultra low-noise performance

Specifications

Brand
Behringer
Model
FBQ1502
Type
15-Band Stereo Graphic Equalizer
Channels
2 (Stereo)
Feedback Detection
FBQ Feedback Detection System
Subwoofer Output
Dedicated mono with adjustable crossover
Power Supply
Shielded toroidal transformer
Amplifier Type
Ultra low-noise audio operational amplifiers
Rack Size
2U, 19-inch standard
Application
Live sound and studio

Frequently Asked Questions

When a frequency begins to feed back, the corresponding band's LED lights up on the FBQ1502's display before it rings out audibly. You pull that band down reactively rather than guessing — it functions as a real-time frequency analyzer during soundcheck and the show, giving you a visual map of your most problematic frequencies in the room.
The FBQ1502 uses ultra low-noise op-amps and a shielded toroidal transformer, which keeps hum and hiss well-controlled for a unit in this price tier. It's appropriate for tracking and mix inserts on buses, though high-end mastering engineers working at very low noise floors would reach for something more transparent. For project studio and live applications, the noise performance is genuinely strong.
The mono subwoofer output taps a frequency-adjustable crossover, letting you route low-frequency content to a dedicated sub amplifier and cab directly from the EQ — useful for a bi-amped live rig or a sub-integrated studio monitor setup. The crossover frequency is adjustable, so you can tune the handoff point to match your sub's response.
Yes — the FBQ1502 is a dual-channel unit, so you can run stereo or use a single channel in a mono signal chain. Each channel is independent with its own band controls, so there's no compromise using just one side.
The FBQ1502 is a standard 19-inch rack unit. It occupies 2U of rack space, so plan accordingly in a compact fly rig or shallow rack case.