These packs typically feature 80s dance and pop classics, early 90s house, or "Old School" remixes.
In the context of online file sharing and the "Scene" (digital piracy and remixing communities), the term is a tag used to indicate a "Proper" version of a release that fixes errors found in a previous "nuked" or lower-quality version. The "(11)" likely refers to the volume or part number in a series of "Retro Remix Quality" releases. Typical Content Retro Remix Quality (11).rar
A "Proper" feature ensures that the tracks have correct tags (metadata), no audio skips, and are ripped from high-quality sources like original CDs or vinyl. How to Use These packs typically feature 80s dance and pop