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Product Overview
The 4020 Retro EQ stands apart in McDSP's lineage as an original design rather than a reissue, crafted to deliver the smooth, musical character of vintage analog EQ without nostalgic compromises. This four-band architecture pairs shelving filters on high and low frequencies with two parametric mids, each operating under a gain-dependent variable Q system that tightens selectivity at higher boost and cut settings. The result is surgical precision when needed, alongside the forgiving musicality that defined classic analog units.
The filtering architecture deserves particular attention. Both the high-pass and low-pass filters employ split-octave topology, transitioning from 12 dB/octave slopes near the selected frequency to maximum 24 dB/octave steepness. This graduated approach avoids the phase distortion typical of brick-wall designs while maintaining effective high-frequency rejection or low-frequency control.
McDSP's proprietary output stage topology prevents digital clipping while layering analog saturation modeling, creating a subtle nonlinearity that gentles harsh transients without audible coloration at moderate settings. The combination of double-precision processing, zero-latency algorithms, and native optimization for current processors ensures transparent operation in demanding mixes.
Version 7 delivers the expected interface refinements and processor compatibility updates. For mix engineers working across multiple sessions, dual activations per license and both mono and stereo instances provide practical flexibility. The 4020 suits mastering work particularly well, though it performs equally in mixing and tracking applications where analog warmth enhances modern digital sources.