Feedback on Costco & Amazon sound absorption panels from folks who have purchased them.

We have been through this before

we designed and fabricated all the acoustic panels for rev runs  renovation secret cinema

https://flic.kr/s/aHsk7BnbES

personally never liked Owens corning as an acoustic panels these types of panels absorb too much sound and make the room too dead they are great for slap echo only

instead we built our panels from https://www.acousticalsurfaces.com/sound-silencer/ceiling-wall-panel/

https://www.acousticalsurfaces.com/sound-silencer/ceiling-wall-panel/

theses panels are unique they are both absorptive  and diffusive at the same time

so they make the room sound better without making the room sound dead

give us a call we can assist you 

dave and Troy

Audio intellect NJ

@gkelly  Thank you so much for your detailed answer.

A lot of great ideas, thank you.  In regards to using the Corning 703, there is a great place in Burbank CA called Speaker City USA that sell speaker grill material on a giant roll.  Seems like a good material to try out.  -John

@mitch2 thanks for the DIY link

Timely thread as I’m also considering adding additional room treatments. 

I do not have any experience with Costco or Amazon vendors, only GIK - I have their 10" thick Sound blocks behind the speakers and wall diffusers.  

A couple of comments...

According to GIK, you wont get adequate bass absorption from thinner panels - it does take a lot of mass to absorb the lower frequencies.

Also try moving the speakers - it is often suggested to move speakers out far from the rear wall, however in my case, that made the bass from my from my Harbeth 40.3 XDs bloomy/muddy. The rear of the speakers are currently about 2 ft from the rear wall - much better than 5ft out. Obviously that’s my speakers in my room but it illustrates the variability in frequency responses based on speaker position alone, and it’s a free experiment.    

I tried a few from amazon and it "seemed' like it works. it dampens the subs resonance. BUT it does have the effective impact as compare to GiK or ATS panels that i use for the most part.