McDSP 4020 Retro EQ HD

The 4020 Retro EQ is a four-band EQ and complimentary filter set. The HF and LF bands are shelving EQs, with two additional parametric EQs at the HMF and LMF bands. All EQ bands operate on a unique gain dependent variable slope/Q system for a vintage smooth sound and increased boost/cut frequency selectivity high gains. The HPF and LPF filters use a unique split-octave design giving a 12 dB/Oct slope near the selected frequency, and a maximum slope of 24 dB/Oct.