Bass trap placement in my room

[on the run]

Hey guys, i've finally decided to get organised and get some frames built for the rockwool batts I brought ages ago, have been so busy myself I haven't had time to do it and am beginning to think i will just screw it up anyway so I'm going to try and find a carpenter to get the frames done. But before I do I just have a few qs: My room:



I have 12 900mmx1200mmx100mm batts. My question is where would be the best places to put them in the room? Keep in mind I don't think i will be able to mount any on the walls or cielings as I'm not allowed to drill into the walls or anything. Would it be better to make 12 seperate 4 inch panels and space them around the rooms/corners, or am I better making them into 6 8 inch panels and just sticking one in each corner, a couple behind the speakers and one behind the listening position?

If I make 12 do any of them need to be faced, will they absorb too many high frequencies?

Cheers guys for your help!

[on the run]

or i should also mention i already have 4 professionally made panels my dad stole from his work, they are 2 inches thick so i assume they are high frequencies absorbers. i would use these on the first reflection points if I was going the 6 8 inch panels option.

[Glenn Kuras]

You want the panels to straddle corners and if you can not attach them to the walls then put them on stands. Putting facing (FRK) will help not to over absorb on the low end and also act as a membrane to help absorb a bit more low end.
BTW you can also put some on them along the floor to wall corners, which you would not need to mount. Kind of like we did when we tested our product in the lab.



Top right picture.