Peavey Q 431FM is a 31-band graphic equalizer designed for monitor systems, featuring -18 dB of cut and +12 dB of boost to address feedback problems. It includes a feedback detection system that identifies and helps eliminate feedback by illuminating LEDs above the associated frequency band. The Q 431FM is ideal for catching and reducing feedback on-the-fly during performances or identifying susceptible frequency bands before a performance to eliminate potential feedback issues.