If you need the exact for the 4.8, it’s bundled inside the installer (look for *.dld or *.dls files after install in C:\Program Files (x86)\Ashly\Protea\Devices\ ).
: Supports 12, 18, 24, and 48dB/octave slopes with Butterworth, Bessel, and Linkwitz-Riley filter types. ASHLY AUDIO Setup and Connectivity To use the software, the 4.8SP connects to a Windows PC via (front or rear panel) or ASHLY AUDIO software dlms ashly protea 4.8