Official updates for the ULT series and related mixers are provided directly through the MyPreSonus portal. These official files are typically .zip or .img formats rather than .rar .
If you are looking for official software or firmware for the PreSonus ULT18 Subwoofer Go to product viewer dialog for this item. Download ULT18 rar
stijnwop/manureSystem: Manure System modification ... - GitHub Official updates for the ULT series and related
Stick to the official PreSonus site to ensure your hardware isn't bricked by faulty or malicious software. Download ULT18 rar