Just ordered more wood and rockwool, picking them up on saturday. I am going to start building 6 new absorbers next weekend. They will be 1200x600x70 (mm) and have 50 mm wool layer inside, leaving 20 mm airgap behind. These are going to be the thinnest traps I have. I will then have a total of 17 bass traps / absorbers in my room if one trap is considered as 1200x600 size.
