First comes the plan

Hello everyone, I'd like to say that your advice is very much appreciated, almost vital. I've read alot here - and I came up with a design of my own. Basicly I've rented a new room for the small tracking room I'm planning. The room is pretty much a simple shape, door in the middle of the width wall, window on the other side parallel. Leaving me all 4 corners bare and ready. The wall with the door is made of bricks, the window wall is concrete - though the walls to the side of the LP left and right are made of gypsum. I'll have to drill in to see what's inside/behind, so I can't tell you that right now. Basicly no one lives on both sides of the walls - just storage places - isolation is not critical. I worry more about the inside acoustics... The room is on the ground level - it's an old roof-tiled house. The electricity wires pipes are on the face of the walls - not inside them. I'm bringing an electrician soon to check how much power this room can manage. I'd like to know what should I do with the window, and how good is the plan so far... I'll post real photos soon. in the meanwhile, here's the plan. Thanks alot for your time, Philip

it looks like a reasonable approach, you can also put a cloud over top of the mix position and a small carpet under you desk. maybe a small carpet in the back to adjust live-ness. on the back of the door you could also hang an absorber if you find you need it.

A cloud will certainly be there :) I just didn't want to mess up the sketch image ... Though I haven't decided what cloud it's going to be - this is from an aesthetic point of view. When you say a carpet at the back - you mean, instead of the mix position? I might end up recording something like a flute or a guitar at the back - where there is no carpet - but there won't be a cloud there either... some fluttering. I'll have to make a first decision, before I start trialing-erroring :) Thanks for the point out mate PS: I'll add the .skp file

well if you use a small throw carpet you won't need too much trial and error :) and if you need something more you can readily add some more treatment but in a small room you like yours, you have quite a bit already...

I'm thinking about putting the 4" side absorbers angled - for a wider band. I'm not sure about this - would appreciate a thought or 2. with 10-9cm being the largest airgap. The question is how to angle them? Absorbers will be 1.8 x 1 meters. Center at ear height. The SSC basstraps aren't cheap that's for sure. I'll need around 120 batts of 120x60 60kg/m2 rockwool. yes - 60kg/m2 will go for basstraps and broadband. 1 batt is around $8. quick math brings me to around $1100 just for the material :) updated sketch:

flip the side wall treatments so the angled toward the back instead of front... (unless they're totally absorbative...) also, maybe look at using fewer commerical products versus DIY in terms of cost and efficiency if the cost is too high. you can also consider starting with less treatment and add more as needed...

Panels are totally absorbtive - basicly just wool and fabric. The angle was more for a wider absorbtion - but it's just a question of theory and practice.

Folks, I have an option to take 36kg/m2 rigid fiberglass or 60kg/m2 rockwool. both cost basicly the same, rockwool costs slightly more. The question, what would you take for a SSC basstrap? I'm aware of the 703 tests that were made. Furthermore I hear many times that more mass and less density is a much better bass trap. All points to the fiberglass for now. Please share your thoughts.

check on http://www.bobgolds.com/AbsorptionCoefficients.htm for comparison of rockwool versus 703. comparatively speaking rockwool or 703 are significantly less dense than sheetrock or concrete.

gulfo, thanks for your advice. I gather I'd need real tests made with different materials for the superChunk itself. It'll be hard to try and get information about the SSC from 1" on wall measurments. I guess I'll go FiberGlass afterall. And here are some real world pics of the room... notice the outlets which are going to be covered by the SSCs.

given the wiring is conduit on the wall (as opposed to being in the wall) it should be fairly easy to relocate.

I did relocate one at the back, but that's without adding anymore conduit. Since the wiring is done, I won't be able to do so this time. Or else I'll invite the electrician once again. I believe putting a cable to the socket from within the basstrap will do allright. Not a great solution, but workable.