JBL Paragon + Curved Acoustic Walls for Park Concerts + DIY Plastic Sheet Curve for Cabin Sound Reflection - Hope what ?

Today, I listened JBL Paragon short video and sound was 5X greater than the youtube videos. I have bose speakers connected to pc. Than I looked JBL Paragon drawings and there was curved wall in front of it. I thought I cant buy the parts , wood etc but I can make a plastic curved wall with painted with epoxy paint. I am poor and can afford solid 2mm thick polypropylene sheet with 10 foot to 5 foot and can cut it in two to make the curved walls for cabins in house. I am thinking to paint or spray epoxy on reflecting surface to cut the loss of sound. I found another solution to keep the curve easy and controllable with sailors rope and tighting it for two edges, final shape will be a big C.
I am thinking these walls inspired by architectural curved standalone park concert acoustical walls. What do you think ? Or I can use single curve and turn the speakers to the wall at the center or two speaker with stereo angles. What should one to do to make this wall is a real improvement ? I will use lower volume levels.

Mustafa Umut Sarac
Istanbul