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Post by keymod on Dec 15, 2015 4:53:41 GMT -6
I've built about 25 panels using various methods and fabrics... I've found that fabrics with a little bit of elasticity are much easier to attach without wrinkles (such as the speaker fabric mentioned above). I ended up buying most of mine at a fabric store, but if you go that route, I would bring a piece of 703 with you to make sure the fabric is dense enough to hide the color of the 703 underneath, especially if you're using a light colored fabric. I ended up having to double up some of the white fabric I bought. Also, if you're hanging 4x2 ft panels, I would recommend using drywall corner bead to make a frame around the front of the 703.... this will keep the edges nice and sharp. You can jut rivet the frame together and the fabric will hold it in place. Otherwise the 703 won't hold it's shape at the corners: Its' the difference between this: and this: Great Idea about the corner bead.
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Post by keymod on Dec 15, 2015 4:56:19 GMT -6
Do you put anything on the back of the panels? How do you attach the covering material to the 703?
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Post by mdmitch2 on Dec 15, 2015 9:21:45 GMT -6
Do you put anything on the back of the panels? How do you attach the covering material to the 703? I screw together a very basic 1x2 wood frame to make the back of the panel (24" x 48"), which creates an air gap, and gives you something to attach the fabric to. I use some scrap wood to make basic corner bracing (see pic). So to put it all together, first I lay the fabric face down, then the corner bead frame on top, then the 703 sits inside that, then the wood frame rests on top of the 703. Then just pull the fabric around the edge of the wood frame and staple it down with a staple gun (I use a cheap electric one). Completely staple down one of the 4ft sides every 2 inches or so, and then go to the other side, and staple it down while holding the fabric fairly tight to prevent wrinkles. Then do the same on the 2 ft sides, but pull the fabric over the back and tuck it in to make the corners look nice (it's easy with a little practice). One step I left out for simplicity's sake is to attach a thin/cheap piece of muslin (or whatever fabric) to the wood frame before putting it all together. This will completely 'sandwich' your 703 and prevent any fiberglass particles from escaping. It's probably not required, but it also looks a lot nicer, especially if you're making gobo type panels (see pic). Also, you can double up your 703 for thicker panels/batter bass absoprtion. By the way, I mostly borrowed this design from some old GIK panels I have. And if you only need a couple panels, save yourself the effort and just buy theirs! Corner bracing / fabric fold: Back of gobo type panel (dark wood is a stand, not part of the panel)
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Post by Randge on Dec 15, 2015 10:10:31 GMT -6
I use 2X4's cut down to perfect 2" and make framed boxes so I can remove them easy later if I change my mind. The material goes on more evenly, too. Attachment DeletedAttachment Deleted
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Post by keymod on Dec 15, 2015 10:34:48 GMT -6
Nice,thanks for the tips.
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Post by Randge on Dec 15, 2015 11:34:33 GMT -6
I would have made them bigger, but the only supplier in Nashville only stocks 2'x4' 703, so I had to go that route or wait a couple weeks for the 4'x8' sheets to come in. I wanted to get it done, so I proceeded on with the smaller ones.
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Post by keymod on Dec 17, 2015 4:26:50 GMT -6
So, FWIW, I just received delivery of some GOM fabric which I purchased from GIK. The stuff is beautiful - texture and color are superb.
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Post by scumbum on Mar 21, 2016 15:25:00 GMT -6
I'm planning on treating my ceiling with 703 and i'm wondering if anyone knows of an acoustically transparent fabric for covering that I can look into, and also won't break the bank? I'm definitely looking for something very white and un attracting in color, i don't want a dark color pushing down and caving out my room. I know of muslin and burlap, any other suggestions or links to check stuff out is appreciated... thanx Is burlap acoustically transparent ?
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Post by M57 on Mar 21, 2016 15:43:32 GMT -6
Is burlap acoustically transparent ? That's my understanding.. Burlap is very transparent. This isn't a guarantee, but if you can't breathe easily through the fabric, it is not suppose to be transparent. That said, i've noticed that some Guilford of Maine 'acoustic" fabrics are not super easy to breathe through, so who knows..?
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Post by mrholmes on Mar 21, 2016 16:53:45 GMT -6
I'm planning on treating my ceiling with 703 and i'm wondering if anyone knows of an acoustically transparent fabric for covering that I can look into, and also won't break the bank? I'm definitely looking for something very white and un attracting in color, i don't want a dark color pushing down and caving out my room. I know of muslin and burlap, any other suggestions or links to check stuff out is appreciated... thanx To bad I do not know the english name for it. In Germany its called Schleiernessel and it looks like this. Its very thin and lets pass the HF range. I did use it for all my DIY baffles... and it works Its super cheap fabric.....
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Post by M57 on Mar 21, 2016 17:10:12 GMT -6
^^cheesecloth?? Pretty sure that would work, but I don't know that it's inexpensive.
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Post by mrholmes on Mar 21, 2016 20:26:23 GMT -6
^^cheesecloth?? Pretty sure that would work, but I don't know that it's inexpensive. It is super thin...
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Post by M57 on Mar 21, 2016 20:31:02 GMT -6
High frequencies aren't the problem. Most any fabric works for high frequencies. It needs to pass low frequencies - that's why it's critical for bass traps. Otherwise you're making things worse by trapping highs and bouncing lows.
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Post by tonycamphd on Mar 22, 2016 8:25:26 GMT -6
High frequencies aren't the problem. Most any fabric works for high frequencies. It needs to pass low frequencies - that's why it's critical for bass traps. Otherwise you're making things worse by trapping highs and bouncing lows. I figure you probably misspoke here, but just to clarify, no single layer of cloth material is going to stop low freq's, it's the upper mid/high freq's that can start to get reflected back into the room with too dense of cloth, a little low mid is reflected back into the room via some dense cloth, but definitely NOT any low to sub freq's.
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Post by svart on Mar 22, 2016 8:44:00 GMT -6
From time to time places like Parts Express will have blowouts on speaker grill cloth too. It's pretty soft and thin, so you might need some kind of backer to keep it flat. I made some framed absorbers with surplus patio screen as the backer and just stretched the grill cloth over the frame/screen. Looks great, but overall I found that buying the rockwool "boards" and using burlap and spray glue was just easier than building wood frames.
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