Looks great. Does it matter what size room that would go in?
Very cool, I really want to make one of these! Where's a good place to hang it? On the front wall between the speakers or on the back wall behind your head?
Nice work! How much does it weigh and how will you affix it to the wall?
Thanks for the compliments, guys. Answers to your questions kind of overlap since there's a bit of info one should be aware of regrading the implementation of diffuser devices in the listening space, so I'll just start spewing what I know and somewhere in all of it you'll find your answers. The size of the room isn't so critical, but you do want to avoid locating the unit closer than about three feet away from the listening position because inside that range you can experience some weird sonic artifacts and anomalies. Also, if the device is located a good distance away from the listening position, say twice as far or more as the distance between the speakers and listening position, you likely won't hear much of its effect...especially if it's just a single, smallish unit. Diffusers work best when several units are clustered or arrayed, so one of the dirty little secrets about diffusion is that it takes a lot to start having a noticeable effect..unlike absorption which shows immediate and apparent benefits when located at early reflection locations. Finding the best location for a diffuser (or a cluster of several) depends on several factors, as a general rule you want to try to locate them on any flat, hard surface areas that are within close proximity to the early reflection locations, but not necessarily at an early reflection location (where absorption is usually the better choice). Rear walls are a great location for them if the seated listening position isn't too close to the wall and the early reflections on that surface are treated with absorption. Along side walls at about head height when standing (or higher) is also good. On the front wall directly behind dipole or bipole speakers is a very effective location for them, and on the ceiling in an area that's generally above the listening position is also good.
The important thing to understand when addressing room acoustics for hi fidelity playback is that you want the listening position (LP) to be in a reflection fee zone (RFZ), which is an area that's free of early reflections (the bad kind). An early reflection is sonic energy that's reflected directly toward to the listening position from hard, flat surfaces and arrives there too quickly after the arrival of the primary sound wave coming directly from the speaker. Early reflection locations can be found using the mirror method,
http://www.audiokarma.org/forums/in...means-why-its-importat-how-to-find-it.446798/
...and the general rule in determining if it's an early reflection is to take the distance from the speaker to the listening position and subtract that from the sum of the distance between the speaker and the early reflection location and the early reflection location and the listening position. If that distance is less than around 17' it's an early reflection. For instance, lets say the distance between the speakers and LP is 10'. Then lets say using the mirror method you found an early reflection location on one of the sidewalls and it's 7' from the speaker and 9' from the LP....so 7+9=16
So you take 16 (distance from speaker to early reflection location + early reflection location to LP) and subtract 10 (distance from speaker to LP) which = 6.
6 is less than 17 so that spot would be generating an early reflection. If the spot you found with the mirror method is say 14' from the speaker and 15' from the LP and the speaker is 10' from the listening position then you'd have 14 + 15 = 29. 29 - 10 = 19 and 19 > 17 so that would be a late reflection...which is ok. I like to put diffusion anywhere in an area that's in close proximity to where the distance delta is near 17 (but always greater than 17)...so filling in the gaps between absorption a little ahead of, even with or in areas behind the LP are good.
Not sure what the unit will weigh yet. I'll definitely get that answered once it's completed.
My last listening space was a mix of A LOT of absorption and some diffusion in a nearly square room. My new listening space is larger and without as many parallel surfaces so it doesn't generate quite as many early reflections as the prior space. In addition to that, it's my living room (last space was out in the garage), so I'm conscious of the visual aesthetic of the treatment devices I'll be using. I think diffusers have a great deal of visual appeal, so that combined with the fact that I don't have a lot of early reflections has me wanting to try a lot more diffusion for this current room I'm using. I'll be building more of these as well as some other different diffuser types.