My subwoofer is

Hi all,

I have just bought a new Edifier S350DB speaker. But in some songs, my subwoofer emits some strange sound like rattling sound.

The first song that I played "Infinity Ink - Infinity (Dubdogz & Bhaskar Remix) (Bass Boosted)"
YouTube

The second song: "Imany feat. Filatov & Karas - Don't Be So Shy"

YouTube
Does my subwoofer have any problem?

Thanks!