ExaktFilter:Original Release
In the original release of Exakt the drive unit models were rather inflexible. The roll-on and roll-off of each drive unit were modelled separately but could only be deployed to correct for both the magnitude and phase of the natural response, or do nothing. At the lowest frequencies there was very little we could do due to the massive processing requirements, so for most speakers we left the natural roll-on alone. Furthermore, we didn't have a viable model for the roll-on of ported systems or the capability to correct for any fixed internal electronic filtering.
It should be noted that the original release for many supported speakers is not available as a selection using the current version of Konfig. The file format is very different to what is used today and is not readily supported by the Exakt compiler.