For non-permanent room treatments, reach out to Michael Green Audio. Michael is a friend and offered me some good advice as a consumer and as I have moved into the business.
He specifically has a "Room-Tune" kit that consists of stuffed fabric panels that can be attached with thumb tacks so really not permanent. He also has a forum though it has been a little less active over MR 6 months.
He can offer a POV on where to place panels. The nice thing is for a normal room pricing is in the hundreds, not thousands
Here is the link to Michael's site:
https://www.michaelgreenaudio.net/
He specifically has a "Room-Tune" kit that consists of stuffed fabric panels that can be attached with thumb tacks so really not permanent. He also has a forum though it has been a little less active over MR 6 months.
He can offer a POV on where to place panels. The nice thing is for a normal room pricing is in the hundreds, not thousands
Here is the link to Michael's site:
https://www.michaelgreenaudio.net/