PSP ClassicQ is inspired by various classic British-style equalizers. It captures the sound and flavor of famously musical high and low filters (such as those in early Neve EQs), melded to very precise mid-range filter. In addition, PSP ClassicQ offers a selectable simulation of class A circuitry and output transformer for a unique, vintage-style color.

On top of these classic features, PSP ClassicQ adds extremely useful features such as an adjustable high pass filter, switchable Q for low and high-shelf filters, as well as a sweepable mid-range bell-type filter. The design of PSP ClassicQ lends it especially well to fixing and shaping individual tracks.

Also included is PSP ClassicQex, which is extended version of the PSP ClassicQplug-in. All features of the previous version are available, but ClassicQex brings an additional Low Mid section for more precise tonal adjustments.