I've never used GIK panels but know they are effective because they are all standard old school acoustic panels fundamentally no different than I have been making and using since the 1970's. That is old school.
We have learned a lot those 50 years. Panels, diffusers and such still work but there are a lot more refined and sophisticated methods now. If you want acoustic panels I would get Owens Corning 703 acoustic panels, cut them to the size you ordered, wrap them in some fabric you like, and put them on the wall. When/if you get GIK you will then be able to compare and send them back when you realize they are scarcely any better than you made for a fraction of the cost.
GIK do have a no-questions money-back guarantee, don't they?
The newer tech does. Synergistic HFT are a much more sophisticated and effective answer to room acoustics. You could probably buy a couple sets with the money you saved with DIY panels. These things all work together. Ditto helmholtz resonators and some other stuff that is out there.
Another big one nobody talks about, turns out the vast majority of room resonance problems are mechanical energy coming directly from the speakers into the floor and from there to the walls and ceiling. Speakers not isolated do this big time. And no, spikes and cones are not isolation. Springs. Springs are isolation. Speakers isolated on Townshend Podiums improve the whole room. You have to hear it to believe it. But all springs are an improvement and you can start cheap and try Nobsound.
Now if you do this you will find Nobsound, $30/set, OC703 $50 for several panels, for less than $100 you have accomplished more than whatever GIK will do. Don't believe me? Only $100 to know for sure.
We have learned a lot those 50 years. Panels, diffusers and such still work but there are a lot more refined and sophisticated methods now. If you want acoustic panels I would get Owens Corning 703 acoustic panels, cut them to the size you ordered, wrap them in some fabric you like, and put them on the wall. When/if you get GIK you will then be able to compare and send them back when you realize they are scarcely any better than you made for a fraction of the cost.
GIK do have a no-questions money-back guarantee, don't they?
The newer tech does. Synergistic HFT are a much more sophisticated and effective answer to room acoustics. You could probably buy a couple sets with the money you saved with DIY panels. These things all work together. Ditto helmholtz resonators and some other stuff that is out there.
Another big one nobody talks about, turns out the vast majority of room resonance problems are mechanical energy coming directly from the speakers into the floor and from there to the walls and ceiling. Speakers not isolated do this big time. And no, spikes and cones are not isolation. Springs. Springs are isolation. Speakers isolated on Townshend Podiums improve the whole room. You have to hear it to believe it. But all springs are an improvement and you can start cheap and try Nobsound.
Now if you do this you will find Nobsound, $30/set, OC703 $50 for several panels, for less than $100 you have accomplished more than whatever GIK will do. Don't believe me? Only $100 to know for sure.