Back wall is glass double door , what type of curtain to use

[Steve M]

Just finishing up big project and almost ready to hook things up
My Back wall is a double Glass door that goes into main entry way from sunk in HT living room and we close it for movies ,
I put a put a blanket over it and wow what a difference , like I added more power to my temporary receiver i am using , and way better sound

Any suggestions on brands , company's that make a specific acoustic curtains , use a regular one ?
Do i want to use some thing top absorb a lot or not so much since its back wall . I was looking and they do make curtains to make your room sound proof and absorb low frequencies etc so I am reaching o
so to not do the wrong thing here

Thanks for your help

 

[j_garcia]

They don't necessarily need to be acoustic curtains, just some good quality ones. ANY curtain is better than glass.

 

[STC]

I used double railing curtain. Used thick material like those you find at the cinema entrance.