I use a pair of Silverline Preludes with grills off, but the sound is still pretty good with them on (parties, fear of driver poking). I have a beef with much of the speaker design world in that some drivers are very fragile and can be easily dented...Magico tweeters...how happy would you be if some party goer stuck their finger in that tweeter? My Preludes have screens over the tweets so I worry less, but still...some protection for these things seems appropriate and should be designed in somehow without sonic penalties.