Stereo Speakers behind a perforated screen- How much loss in sound?

I have  a SMX acoustically transparent screen- Since I now want to use the room for music and theater- Two different systems- Will I lose any thing is sound by having my stereo speakers behind the screen- _ thks
There will be some loss of upper treble, the amount of loss depends on the screen, but usually less than 1dB, just have the speakers as close to the screen as possible.
Are you using a center? Subs? where are they?

I'd never, ever put a screen or anything else between me and my speakers for critical 2-channel listening.  Acoustically transparent screen???  Yeah right.  Unless my speaker designer meant it to be there, it's gone.  Can't you just raise the screen for stereo listening?