The FP-PEQ3 from RDL is the ideal choice in many applications where parametric equalization or acoustic notch filtering is needed. The compact unit is a single-channel module featuring three identical independent filters. Each filter has separately adjustable frequency, boost/cut and bandwidth parameters.
The frequency has three fully overlapping switch-selectable ranges: 15Hz to 200Hz, 150Hz to 2kHz and 1.5kHz to 20kHz. The boost/cut provides a +/-15dB range, switch-selectable to produce either cut or boost, making acoustic adjustment easier. Setting a given filter's boost/cut to minimum completely removes that filter from the circuit. The bandwidth allows adjustment from 0.04 octave to 1.5 octaves.