The dbx iEQ-31 is a dual-channel, 31-band graphic equalizer equipped with integrated feedback suppression, designed for installed sound and live reinforcement systems. Each channel provides independent control over 31 ISO-standard frequency bands (1/3-octave spacing), allowing for precise tonal shaping and room correction to overcome problematic acoustic resonances and achieve a flat system response. The unit features an intuitive front panel with slide potentiometers for each band and clear metering for input and output levels. Beyond standard equalization, its defining feature is the built-in feedback suppression circuit, which can be set to automatically detect and notch out ringing frequencies before they become audible feedback, a critical tool for stabilizing systems in challenging acoustic environments.

The iEQ-31 is designed for both ease of use and professional results. It offers multiple operating modes: the equalizer can be used independently, the feedback suppressor can be used alone as a set-and-forget solution, or both can be engaged together for comprehensive system control. The feedback suppressor typically includes controls for threshold, depth, and bandwidth, allowing it to be tuned to be effective yet minimally invasive to the audio quality. The unit provides balanced XLR and 1/4" TRS inputs and outputs, ensuring easy integration into professional signal chains. Housed in a single rack unit with a rugged steel chassis, it is built for reliable performance in both permanent installations and portable rigs.

For system technicians, church audio volunteers, and venue operators, the dbx iEQ-31 serves as a powerful two-in-one problem solver. It combines the essential tools needed to tune a sound system for clarity and tonal balance with a proactive defense against one of the most common and disruptive live sound issues—feedback. By offering professional-grade EQ and intelligent feedback control in a single, accessible unit, it simplifies system optimization and increases overall gain-before-feedback, leading to more consistent, reliable, and intelligible sound reinforcement.