Glenn is 100% right.
Here's what I'd do..
Originally Posted by djd_oz
Hey nms ... thanks for helping a n00b out.
1) Budget = ~$1000
Good budget. You can do an excellent job well under this if you DIY.
2) Music = Electronic Music, mainly techno nowadays. So, yes to bass heavy music.
Thick, quality traps essential then. Do solid square soffit type traps in all 4 corners. You want insulation that's 16" OC for this which makes building a breeze. Make them 18" thick x 16" floor to ceiling. These will work wonders on your low end.
Place your monitors and sub as close to the front wall as poss without touching. I don't use subs, but REW should help you figure out the best location along the front wall.
A 6" thick ceiling cloud will also do great things. Leave at least a 4" air gap above. At least 4' wide. 4' long is fine.
Panels on your R & L walls for first reflections as per usual. 3" thick insulation with 1" air gap behind would be good for your room. Don't go any thinner. 2' OC insulation is good here. You'd be fine with 2'x4' panels placed horizontally at ear level with the center point located halfway between your ears & your speakers.
a 6" thick trap along your front wall between speakers would work well. Extend this up then straddle the ceiling edge which is another great hotspot to hit.
This is almost exactly what I did in my last room which was around that size and I achieved an exceptionally flat & tight low end for bass heavy music.
Here we pay around $40 for a bag of Roxul mineral wool which gives 8 slabs 2'x4'x3". It's all 2.5 pcf (pounds per cubic ft) density. I'm not sure what products they have available at building suppliers there but 2.5-3 pcf is good for this.
You can find a million tutorials for building these. Ideal construction is as lightweight and skeletal as possible while still supporting them and allowing ease of fabric wrap + staple.
I still have 4 $5 Auralex tiles across each of my L&R wall panels. This is a big HF reflection point so it's one spot they're handy.