Unforunately, I do not think it will be possible for me to do much damage to the walls in the roooms since I am renting.
I kinda figured that. The term "residence" kinda gave it away, especially when near the term "semester".
;)
No problems tho. Just gotta build temporary stuff. Nailing won't be a problem, and you won't create any more holes in the drywall than someone with a lot of posters to hang up. They might be a little bigger, but not by much.
Does just having a closet converted into a back-of-the room basstrap perform just as well as having traps in the corners, by directing sound into itself instead of causing it to build up in the corners?
I'd do both. In either of the rooms you mentioned in the multi-bedroom unit, the closet door is near the middle of the back wall, so you'll have room in the corners to install rigid fiberglass panels in the corners.
From what I've heard, those LENRD things are great if you can afford them. If you can swing a hammer, you can save yourself a lot of money. For the closet door replacement, make a frame out of 2x2 lumber, as close to the height and width of the existing closet door as you can get. You may need to install a cross-bar at the middle to make it robust enough. I'd put 1" rigid insulation on both sides- wrap it in fabric (absorptive fabric- the best back wall of a mixing room is one that absorbs as much sound across the entire sound spectrum as possible.
For the corner units, do basically the same thing- a frame built from 2x2 lumber, 2' wide and just short of the ceiling height of the room. Put fabric-wrapped rigid insulation, 1" thick, on each side of this, and just stand it up in the corner if you don't want to attach it. You can use drywall anchors if you don't want it moving around.
Then, on the walls in spots where you'd get early reflections from the monitors to the listening position, just take a few 2'x4' rigid insulation panels, right out of the box, wrap them in fabric, and put a single mounting screw right thru the face of it (use a big fender washer, tho!) and into a drywall anchor in the existing wall. You just hang them like posters, wherever you need.
I'd put at least a couple on the flat parts of the back wall, one on each side wall in the right spots.
The ceiling will be trickier. Building a cloud is pretty much just hanging rigid insulation panels a few inches off the ceiling. Since you don't want to make any more holes than necessary, you may want to just hang a single 2'x4' rigid ins. panel in the right spot over the mixing position. Again, find the place where sound from the monitors will reflect directly at where you're sitting.
You could buy Auralex stuff if you wanted, but this kind of thing will be about as effective, certainly more effective dollar-for-dollar.
Any of the rooms in the plans you've posted will function- but the biggest room will almost always sound best- it's a matter of nodal freq's evening out before they get into the easily-audible sound spectrum. Unless they're square or something unfortunate like that, a bigger room almost always sounds better if treated the same.
Kase
www.minemusic.net