The PSP E27 is a multistage equalizer plug-in (VST3, VST, AAX and RTAS for Windows; AudioUnit, VST3, VST, AAX and RTAS for Mac OSX) modeled after our analog equalizer E27. The PSP E27 offers three-band equalization with nine selectable frequencies in a standard 500x package. The PSP E27 equalizer offers +/-16dB of boost/cut at musicially selected frequency ranges, and offers gentle saturation. Low and high filters can work in bell or shelf mode with a single click. The PSP E27 is suitable for both mixing and mastering and it offers an additional preamp stage for global level control. The PSP E27 EQ plug-in also catches nonlinear behavior of analog devices.

PSP is the sole developer and manufacturer of the PSP E27. Functionality and sound of the PSP e27 have been approved by Avedis Audio Electronics. PSP is responsible for all customer support.