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Old 06-29-2017, 10:31 PM
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jimtranr jimtranr is online now
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Join Date: May 2011
Location: Corvallis, OR
Posts: 1,587
Default One last thing that had to be done...via DIY

Preface: Because this last project was DIY, I considered posting it as a new item in the Acoustical Treatment forum. But since the project itself completes the treatment of the bedroom audio system as a minor supplement to the existing GIK installation, I'm posting it here to put it in its overall context.

The bedroom audio system's original acoustic treatment complement was predicated on the assumption that the two jewel cases parked atop the dresser on either side of the center Monster would eventually be moved out of the room. But after due consideration, my wife concluded that for practical reasons the cases would stay where they were. As suggested by the first photo, the proximity of each case to its respective speaker presents a not insignificant SBIR problem.



I knew going in that covering each case with an appropriately-dimensioned 3/4"-thick slab of on-hand packing foam was hardly a solution, though I soldiered on with that yeah-they're-only-there-for-looks arrangement for several weeks before deciding that I had to get real.

Based on an earlier email discussion with Bryan Pape regarding the SBIR issue presented by the dresser's massive wooden front which resulted in the purchase of two 2'x2' 244s, I decided that I'd need a 12"x15" rough equivalent of a 244 to front each jewel case. My wife rolled her eyes...but ultimately it came down to "Okay, Jim, if that's what you really want."

With DeWalt table and miter saws in my tiny basement workshop, a heavy-duty Stanley staple gun, a scrap hardboard panel to square-form the fabric cover, and an old futon frame from which to cadge pine slats I could fashion into a basic frame, I figured I could go DIY. I ordered a single 2"-thick 2'x4' Knauf 6 PCF acoustic "board" and then went off to the local Jo-Ann Fabric store. There I got some muslin ticking and a host of other-customer funny looks (I was the only male in the store) as I held up bolts of cloth to the light to get an idea of their acoustic transparency.

Here's the back end of one of the workshop results.



The front end with two Knauf batts, one behind the other, forming a 4" trap. In cutting the Knauf panel, I found a utility knife useful only to perform the initial scoring of the surface. Using a hacksaw gave me the reasonably square cuts I was able to make.



The trap covered. I did the get-it-tight stapling, but my wife's the real hero in figuring out how to fold the excess fabric corner-tight and then doing it like the good sport she is.



Finally, how the new traps fit in the big picture. Please pardon the tilt--I shot this while sprawled out on the bed.



The end sonic result? Nothing subtle about it. Much better, woolly-free bass definition. Better overall sonic resolution. And, where the recordings embed it, a greater sense of space.

Happiness is...

Jim
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Jim


Bedroom: Aurender N150, TEAC UD-505 (AKM version), EMIA Cu Elmaformer passive line stage, conrad-johnson MF2500, Paradigm Studio 20 v5. Shunyata Delta D6, Altaira CG hub. Shunyata Alpha XC, Delta NR v2, Alpha USB, Alpha and Venom CGC/SGC. Wireworld Eclipse 8 interconnect & speaker cables. Stillpoints footers, Butcher Block Acoustics maple platforms. Stillpoints and GIK acoustic panels.

Home Office:Windows 11 PC/JRiver 31, TEAC UD-501, Luminous Audio Technology Axiom II Walker Mod passive, conrad-johnson Sonographe SA-250, Paradigm SE-1. Shunyata Hydra (Original Version), Venom 10 NR. Wireworld Eclipse 7 interconnects. Blue Jeans speaker cable.

Living-Dining Room: Windows 11 Laptop/JRiver 29, Oppo BD-83, TEAC UD-501 DAC, SOTA Sapphire TT, Graham Slee Era Gold V, Ortofon 2M Black, McIntosh MR-77, c-j Sonographe SC-25, c-j MF2500, Paradigm SE-3. Wireworld 8 IC, Blue Jeans SC. Shunyata Hydra 8 v.2, Shunyata Delta NR, Venom NR. GIK 244 bass & scatter-plate panels.
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