Quadratic Diffusers

@rix 

Have not done anything yet because have been having a new room built. How hard were yours to build?

rix,
Please let us know what you think once they are positioned where you want them in your room. 

Thanks

@hilde45 - I had no idea how much I'd need to learn, and the amount of work involved when I took upon myself to have a go at it. I took logs of cherry wood and split them with a band saw, rant them through a thickness planer and joined them to make 17" boards, 5' long.
If I'd not chosen to make them from solid cherry (the backing board is actually Birch ply board) I am sure it'd gone a lot easier.
Running 60 of the 1/4" boards for dividers, 8 sides, 8 tops and bottoms through the CNC router table was easily the quickest part of the job.
It's what I can do now that I've learned, now that's exciting.

Next will probably be the equipment rack.


@boxer12 - I first want to try them between the speakers on the front wall, just the first two for now. I have a frame with absorption, and I want to keep the bottom of the diffusers up off the floor, so I have free space to run cables etc. 

@rixthetrick 

That's what I've loved about this hobby -- it's lead me to learn things and the payoff is palpable and enjoyable.

I asked on the Acoustic Fields youtube forum about balsa wood for quadratic diffusers -- I mean, why not make it really light, right? His reply was to be careful with soft woods which can degrade over time. My feeling about that advice is that if a balsa (or other soft wood) version can be done very quickly, it's worth the experiment. I wonder if you tried any soft woods?

@hilde45 - I was surprised to learn from a good friend and cabinet maker, that balsa is actually a hard wood (by definition).

This is the very first effort making diffusers, and that being cherry wood only. No idea how that would work out, I am surprised that it would degrade though?

I only used balsa wood as a kid, I’d glue wings on a dowel and shape them for lift. Tear apart a golf ball, which was not easy, unravel the rubber band that was under the skin (are they still made that way, I have no idea?) and make a loom from the rubber and use the local park’s slippery slide as a large slingshot to send it up into the sky. Like boomerangs, every now and then losing them in a tree, at least until the next big storm. Other kids would end up with new (to them) toys. Surprisingly light, the balsa planes could withstand a flogging, they fell a long way after being shot up into the air.

** I used the plans I purchased from Acoustic Fields for my QRD17** With a little modifications in the CNC program, the resulting geometry being the same as the plan, just didos are different.