[How do I remove the grills from the ProMedia 2.1 computer speakers?]

My set up is about three feet away from my sun blocking curtains, which the speakers are facing. Could this be negatively affecting the sound?

[How do I remove the grills from the ProMedia 2.1 computer speakers?]

Thank you.

[How do I remove the grills from the ProMedia 2.1 computer speakers?]

I want to check if there's any difference with them off. Not sure why, but compared to my previous cheaper Logitech speakers, the audio doesn't sound as clear, almost like a smartphone speaker but louder and with bass, and I'm thinking it may be due to the grills.

 

There aren't any instructions on how to in the manual.