Subwoofer cracks when there's too much bass?

Originally Posted by louiey370z

Could this be because it's in the open space in the trunk?? Cause when the song has too much bass, it cracks and it really ***** the vibe up

Subwoofer: Rocksford Fosgate
Amp: Power Acoustik

Also seems like the crack only happens if I have windows rolled down. It happens very rarely if I have my windows rolled up, however, still there's a cracking noise even with windows up. Could it be due to the poor subwoofer or the amp

Video; https://youtu.be/Jj8oxEG-F_E