Behringer FBQ1000 Automatic and Ultra-Fast Feedback Destroyer/Parametric EQ with 24 FBQ Filters High-performance 2-channel Feedback Destroyer and Parametric EQ Automatically and "intelligently" locates and destroys up to 24 frequencies Ultra-narrow FBQ filters for extremely effective feedback suppression, while keeping highest sonic quality "Set-and-forget" default setting enables immediate and super-easy Feedback Destroyer performance Auto mode continuously monitors the mix and automatically sets filters