Hi all!I just build my first two bass traps, 3 more on the way, really having fun building them
I've got inspired here How to make rockwool acoustic panels - YouTube
They are 4.5 inches thick, the Rockwool is 100kg density and I just put two layers of 6cm each layer on each Bass trap. The size is of the Rockwool panels is 120x60 and the structure is 119x59
I bought some wood that I imagined I could design different from the video.
The wood front structure is like this and the back one is the opposite of the front, with the higher opposite (tunnel like).
After that, I built the structure and attached the fabric on the back side
Front Side Fabric (Will place a thick lace type material soon around as a frame for a nicer look)
And that's my bedroom studio, 3 more on the way. (By the way if you do this project, fix the legs before applying the Rockwool with a 5cm screw, but not too tight, you need to be able to turn the legs. Then when you have finished applying the Rockwool, the front fabric, just start to spin the legs and at one point they are going to be tighter. Then celebrate the whole structure by using angles mounted on the back legs and there you go.
Thanks to Gearslutz and It's users that helped me buying the right material!