Hey guys!
 
I've recently been looking to organize my "studio" for optimal acoustic response. It is in a bedroom, but since space is at a premium I don't really have much of a choice. I am primarily a guitar player, so I have an amp and pedalboard already, with a Leslie 760 rotating speaker coming in soon. Additionally, I have a pair of JBL LSR305s with monitor stands coming in as well. I have measured the dimensions of my room, and put them into some online acoustic calculators. Suffice to say, the results were a bit hard to understand. So now I turn to you guys to help me out! I've created a few diagrams of what my room looks like now, and possible options for changes. As it stands, my recording rig is in the corner, which I've heard is not good at all for monitoring. Any help and advice is appreciated! 
 
The dimensions and material of the room are.
North Wall: 12 ft
West Wall: 12 ft
East Wall: 12 ft
South Wall: 13.5 ft
Bookcase corner: 3.5 ft
 
Height: 9 ft
 
Material: Carpet flooring (soft residential variety) and drywall

Here is a diagram of what my room currently looks like:

Here is an option with the amp and Leslie in the corners, and the rig in the middle:

 
Here is another option with the Leslie and amp reversed:

Definitely scrap the first one.

A basic principle for monitoring is to have your speakers facing the length of the room which you have in 2 & 3.

Mount your speakers so they are equi distant from the side walls. That places the triangle of you and your speakers in the centre of the room (side to side).

Have the tweeters and your listening position form an equilateral triangle.

Have your tweeters at ear height.

Have your speakers isolated by some very dense foam/rubber on the speaker stands.

Lots of soft furnishings to tame the mids and highs. As usual though it's how to tame the bass.

I'll leave the rest for some of the other folks. If you want some real hi tech assistance from experts go to gearslutz.com they have a studio building forum and you'll get lots of helpful expert advise. Not to mention looking at the variety of studio builds as they were being done is amazing.

My room isn't nearly as square as that one, which will most likely be a problem.  But I had the bed at one long end, 8-inch speakers on either side of it so the bed worked to absorb a lot of the reflections - even down into the bass range.  I don't think your 5 inches would work so well as mid-range.  It might could work if you moved the bed between the turntable speakers (use them as second monitors too) along your window wall and set up your 'station" along where the bed is now.   At normal levels you shouldn't have too bad of a response if your near-fields there, rather than the longer way in Figs 2 & 3.  Not ideal, but none of them are.
 
best of luck,
 
@

I have a less than ideal space, so I put up some foam and bought ARC 2 software.  It helped a lot.  You just have to remember to turn off ARC 2 before you export anything.

mudgel
I'll leave the rest for some of the other folks. If you want some real hi tech assistance from experts go to gearslutz.com they have a studio building forum and you'll get lots of helpful expert advise. Not to mention looking at the variety of studio builds as they were being done is amazing.

Thanks for the tip. Here's the link: https://www.gearslutz.com/board/studio-building-acoustics/
 
Really looking forward to how this turns out. When I built my new townhome, I had the builder leave the closet out of the second bedroom, and I tiled the floor instead of carpeting. It's basically a 12' x 13' box.
 
Future studio! 

Hello,
For this please visit at creativecurtains
 

I'd look at putting the desk/monitors on the angled wall  although that might be tough if you can't relocate the bed. 

dwardzala
I'd look at putting the desk/monitors on the angled wall  although that might be tough if you can't relocate the bed. 

I would try this also... avoiding parallel surfaces...
In my last design I made all interior walls of what use to be a garage, non-parallel.  Your angled wall seems to be an ideal place to disrupt the parallelism in your overall situation. Then again, that's just my gut insinct as parallel walls suck... Depending on your financial picture, add a couple basic acoustic treatments, now available everywhere like GC (just saw packages there today for $100-300) and yes, consider a profiling/sound shaper like Sonarworks... their Headphone calibration is spot on and they offer room analysis/active sound correction.

Vastman

dwardzala
I'd look at putting the desk/monitors on the angled wall  although that might be tough if you can't relocate the bed. 

 
I would try this also... avoiding parallel surfaces...
In my last design I made all interior walls of what use to be a garage, non-parallel.  Your angled wall seems to be an ideal place to disrupt the parallelism in your overall situation. Then again, that's just my gut insinct as parallel walls suck...

I think you need as much symmetry as possible between the acoustic environments of the left and right channels so they can be processed properly.  So if non-parallel walls have some advantages, still try to make them non parallel in the same way on each side.  Parallelism should only affect higher frequencies.  Lower frequencies don't bounce, they ooze, especially in such a small room.  You always want your desk centered between the walls on it's sides.
 
Also, you don't want a strong early reflection on one side and not the other (in #2 and 3 above, keep the bathroom door closed or put an absorption panel on the other side, or better, close the door and put a panel on both the door and on the wall opposite).  Similarly, you don't want lots of absoption like a bed, open closet or curtain on one side and not the other.
 
I'd move the bed as far to the right (in the picture) as you can and then move your desk/monitors back away as much as possible from the wall behind the desk.
 
If you stand to play your guitar, #3 may be better so you can back up into the space between the bed and the dresser, unless you play with your ear glued to the amp's speaker, as I've seen some do.
 
I'd then try the Leslie (in #3) as far from both corner walls as you can get it, like centered in the space between the bed, desk and corner walls.  I'd probably get rid of the nightstand if possible (unless there's two of you in the bed...).  This might cause the Leslie to bounce unwanted early reflections so maybe put some absorption on its side close to the left monitor.
 
Maybe (not sure it fits) put the bed against the right (in the picture) wall, centered facing your desk.  That would make things more symetrical and open up even more space around your desk and monitors.  You could then stand and play your guitar close to the middle of the room (and turn your amp so it faces the center of the room), but you don't want to stand in the exact center of the room, because frequencies are all screwed up there.
 
Follow TheMaartian's link above for lots of good info on acoustics and making your own absorption panels, the more you can fit and afford, the better.
 
It's pretty tight in there, with all that's going on.