
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.
$179.00*
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*Price sourced from Amazon.com. Last updated:Jun 19, 2026.Price and availability are subject to change.
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Overview
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
Pros & Cons
👍 Pros
- The FBQ Feedback Detection System lights up problem frequencies in real time, letting you pull down a band before feedback rings out during a live show.
- Ultra low-noise op-amps and shielded toroidal transformer produce a remarkably quiet noise floor for the price — signal chain integrity holds up well across a full mix.
- Dedicated mono subwoofer output with adjustable crossover makes bi-amped live rigs and sub routing genuinely convenient without an additional crossover unit.
- 15-band resolution gives enough granularity to address room modes and tonal imbalances without reaching for a parametric.
- Dual-channel stereo design is flexible — run it as a stereo insert, two independent mono chains, or a mid/side pair depending on your routing.
👎 Cons
- The physical sliders can feel slightly loose compared to higher-end EQ units, which makes fine adjustments at small boost/cut increments less precise by feel.
- No bypass relay or true-bypass switch — when engaged in a signal chain, you're always passing through the unit's circuitry even when all bands are at zero.
- The FBQ LED indicators require line-of-sight in front of the rack during a show; in a back-of-house rack positioned at distance, reading the display under stage lighting can be difficult.
- At 2U, it occupies more rack space than a single-rack-unit EQ alternative, which matters in tight fly rigs or compact live racks.
Frequently Asked Questions
How does the FBQ Feedback Detection System actually work in a live context?
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.
Is the noise floor low enough for studio tracking and mastering inserts?
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.
What does the dedicated subwoofer output do and how do you set the crossover?
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.
Can you use only one channel in mono without issues?
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.
Does it require rack mounting, and how much rack space does it take?
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.