Phonic's i7100 offers 24 feedback filters over two channels. Each filter can be independently set to operate in one of three modes: Single-Shot, Auto, and Parametric. In the Single-Shot mode, each filter is automatically assigned and locked to a feedback frequency until it is manually reset. This mode is best for equalizing systems with stationary microphones where feedback generally occur at only certain fixed frequencies. In the Auto Mode, the filters are dynamically assigned and reassigned to match with varying feedback frequencies. This mode is ideal for systems with mic movements where feedback frequencies tend to vary throughout a program. In Parametric mode, the filters can be manually set to function as a fully parametric EQ, capable of fine adjustments over center frequencies, bandwidth, and gain.