grills or no grills on your speakers..matters?

I really don't need the grills on my Preludes as they do have screens on the tweeters...I dust the woofers from time to time as tiny dust particles do not deserve to ride around on my drivers. I put new grill cloth on my sub as it had been damaged by the previous owner, and I can't imagine it blocking anything under its 50 hz or so frequency range...so it stays.

I'll add that when my grills are off and people come to visit, they're drawn to the speakers like a magnet (no pun intended). With grills on, they sit down or head to the kitchen because they known where I keep the scotch.

Grills on. My pet hamster crawled into the bass reflex tube. The devil to pay to get him out.

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Always off when home alone. Always on when I have guests.
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Bifwynne, that reminded me of a friend who lost a pet boa constrictor. He searched everywhere with no luck. Thought it may have gotten outside, so he notified the neighbors to be on the look out for it, and that it was pretty much harmless. Then one day he was moving his JBL L100's (grills were removed) had felt something funny with one of them. He removed the bass driver and found his snake. It crawled in through the bass reflex tube towards the warmth.