Best solution behind a ST screen with my speakers
I've already got a ST screen for cheap (Dreamscreen V4), and the speakers that goes behind it is my KEF Q700, KEF IQ6 center and an XTZ W10.16 sub (with another one going on the opposite wall).
These speakers are not made for baffle-walls as far as I can tell, and as the XTZ is kind of deep at 20" it would take a lot of insulation to fill the void behind the wall. I'm on a tight budget, so switching the speakers is really not an option.
How would you guys build the "wall" behind my screen to hold my speakers? I could build a full baffle wall with insulation in the framework and absorbent covering in front. Perhaps just put super chunks in the corners behind it, or would that just be a waste? Will this give me a nightmare wrg resonance in the void behind the wall?
Might be better (and definitely cheaper+easier) to just have a framework (with or without insulation?) with absorbent covering in front and the superchunks in the corners? This way I could upgrade to a baffle wall with more suitable speakers at a later date.
The front wall is about 2x3m, and I plan on having a 126" 16:9 screen on it. The whole room is 7,5*3m and initial acoustic measurements seems pretty positive except for a resonance at 23Hz which I'll try to work around with moving subs (and adding the second sub I just bought).