Trevor, do you have any experience with acoustic panels and with walls this high? My wife came across these
panels as something she wouldn’t be too opposed.
Seems fine. To increase effectiveness install using method 3 in the details provided in the link. The product you linked does not specify the low frequency effectiveness. Best to back it with roxul as mentioned.
Typically a room is treated so that areas are a mix of diffusion and absorption with bare space between. Be cautious of treating an entire wall if that is your plan. If you plan on ceiling speakers for atmos, consider hanging clouds and mounting speakers in them. These can act as points of visual design interest and also act as absorbers if you lay roxul on top. Less attic penetration that way too.
Plenty of install guides online. Main takeaway is to create a homogeneous space with staggered absorbers/diffusers/bare wall on as much surface as practical. The more surface you treat, the drier the room gets (reducing decay times.) A reproduction space should aim for 300-450 milliseconds. You will be hard pressed to hit the high end of that without substatial effort, but something is definitely better than nothing!
