Many "free" dual audio sites compress audio to 96kbps, which sounds tinny. Moviesmore prioritizes 192kbps to 320kbps audio tracks. For action movies, this means you hear the explosion in the rear speakers regardless of which language you choose.
Searching "best" dual audio movies on Moviesmore reveals a library that covers: moviesmore in dual audio movies best
If you are searching for the best quality, avoid files that are heavily compressed (like "400MB" files). Here is what to look for in the file name to ensure quality: Many "free" dual audio sites compress audio to