Calling all room treatment type specialists...

But in case this point wasn’t made before, 1 single panel won’t do much in a room, unless it’s right next to your head.

As part of a system of 6-10 panels, each does a part of the work. So as part of the entire room treatment, you may want to just keep the poster, and may be use museum quality plexiglass to cover it. It will be lighter than glass, look 99% as good and be a little less reflective. Compensate for it’s reflections by adding panels and diffusion elsewhere.

Art panels make the most sense when you are getting a series of them made. Like, if you had a set of movie posters printed, then you could set up 4-6 art panels and they'd look great.

Best,


Erik

+1 Erik. Would work better from a stylistic aspect to have a series of printed panels, rather than only one panel.
As I stated earlier, the walls do need some areas of reflection and diffusion, otherwise the room will be over-damped. The poster may work between acoustic panels.

So, I went the easy route.  After a quick study online, I headed down to my local art supply and bought a 3x5 foot panel of 1/2 inch black foam board ($12) and a can of spray adhesive (appropriate for photo paper $7).  Laid everything out on a flat area.  Rolled the poster up on a 2 inch round sleeve.  Sprayed the whole board and let it set for about a minute.  Started unrolling and used a plastic spreader knife (4 inches wide) and went to work unrolling and pushing out the bubbles.  I trimmed the excess board away and hung it on my wall with 2-sided tape.  Perfect!?  Well, not quite.  My wife was the first to notice that the direction of the apparent sound on the photo was opposite the sound coming from my speakers.  Could have put it on the opposite wall and fixed that, but a pesky thermostat complicated that idea.  Oh well.  But it looks great, and I'll get to enjoy it tonight when my buddy comes over for a listening session.  May have to turn it up a little extra loud tonight to get the full effect!

Thanks for all the input. 

 i know you went a different route but
x2 with eric send a high quality pic to gik and have them print it on a panel and i highly suggest room treatment ,it has helped me immensly

It takes some skill working with spray-mount. Glad it worked out for you.
(Keep the humidity out of the room).