PSP E27 v1.0.3 WIN OSX-R2R | WIN: 12.5MB | OSX: 20.5MB PSP audioware has released version 1.0.2 of PSP E27, a multistage equalizer plugin 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.