Many piracy groups now operate on Telegram. Search for channels named "480p Mkv Hub" or "Dual Audio Movies." Bots provide instant links to Spartacus Season 1 in compressed, dual-audio 480p.

You likely downloaded a single-audio file mislabeled as "dual." Use MediaInfo software to check track count. If it shows "1 audio," look for another source.

If you decide to go legal but still want dual audio and offline 480p:

Yes. The prequel (6 episodes) is often bundled with Season 1 in fan releases. Search for "Spartacus Complete Collection 480p Dual Audio."