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 the analog equalizer E27 produced by Avedis Audio Electronics. E27 offers three-band equalization with nine selectable frequencies in a standard 500x package. This equalizer offers +/-16dB of boost/cut at musically selected frequency ranges, and offers gentle saturation. Low and high filters can work in bell or shelf mode with a single click.

E27 is suitable for both mixing and mastering. PSP E27 offers additional preamp stage for global level control. This EQ plug-in catches nonlinear behavior of analog devices.

PSP E27 SE (included in the bundle) is a simplified version of PSP E27, a multistage equalizer plug-in modeled after the analog E27 produced by Avedis Audio Electronics. The PSP E27 SE is based on the same great audio engine, but it has a redesigned, simpler GUI making quick adjustments a snap. The PSP E27 SE is equipped with one E27 and one PA11 module. It's perfect for both mono tracks and stereo stereo in which you don't need separate settings for the Left and Right channels.