Johns Standard Control Room

[JohnH]

Sorry for being away for so long.

Been building the eight clouds and 4 wall absorbers. (along with planning a songwriters workshop and multi-performer concert)
These are not the 12 absorbers in 20 minutes for $5 I've read about in other threads.

Cutting 6 QRD pattern slots in 8 plywood panels was fun. Used a dado blade on a table saw with judicious use of the blade height crank wheel, rather than a router. Worked very nicely. Used iron-on melamine edging on the plywood perimeter rather than putty.

Ended up going with a hybrid of both Glenn Stanton designs.
Wooden frames from the first design around the 703 instead of the metal beading.
Room width and light fixtures required using the small clouds (from design 1) to be placed next to the walls, to leave enough space for the large clouds (from design 2) in the rest of the area. I think it's going to look very nice as well.

Total material cost approximately $500 for 8 clouds and 4 wall absorbers.

Photos being taken as we go and will upload soon (after the workshop and concert)

[pcmusicpro]

Hello. really nice work here. I'm looking forward to see how this project evolves.

You can look at my studio design/construction here. Maybe you can find something usefull http://www.johnlsayers.com/phpBB2/viewt ... =1&t=11360

[JohnH]

The camera is getting full, but its in the barn and I'm not at the moment. Pictures coming very soon. Promise

Thanks for the kind words Edu. Nice build on your end too. Floods too? Like Glenn told me, good thing you built on the 2nd floor.

Clouds are almost done, just mounting them on the slotted plywood so they're just about ready to hang. they are very heavy. Now I am extra glad I went with 16" OC ceiling joists. Also wrapped the cloth around the wall absorbers too.

I'm thinking about speaker stands. Can't seem to re-locate all those threads with pictures that showed some sturdy tubular sand filled speaker stands. The search feature is giving me too many results, but no speaker stands. Anyone know of a good speaker stand build thread?

[JohnH]

Here are the long promised photos. I think building the room was easier. Cutting the wood for all those frames . I felt like Rain Man in the diner scene. 246 tooth picks. And that all those slots in the plywood, made a lot of kitty litter. But they turned out pretty good.

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[JohnH]

More photos

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[Soundman2020]

Loved the "finger" pic! (At least you had good glue to put it back together...)


- Stuart -

[JohnH]

But walking around with the clamp on until it cured was annoying

[gullfo]

they make smaller finger clamps so you're not inconvenienced

nice work.

[JohnH]

Thank you Glenn. Guess its time to hang em and test again.
I can definitely hear flutter between the rear side walls.

Need to make speaker stands, and set up the speakers in the aprox correct positions, then do the mirror test and hang wall absorbers.

Any help on the easy good speaker stands? I can't seem to relocate the threads.

[gullfo]

cement blocks, fill any openings with insulation and cover in cloth. cap the top and bottom with wood. put the stack on 1/2" carpet foam (dense) to decouple. under the speaker, 1/2" carpet foam (dense).

[JohnH]

Far out and solid. (Really solid). Couldn't be simpler.
Thanks Glenn.

[xSpace]

I built my stands similar to what Glenn suggested, but knowing that they would be a "moving" part of the environment, I cut sheetrock to fit around the sides of the block and glued the pieces to the stacks of block, that I had also glued together.

You can finish the corners with conventional corner bead and mud or cut some thin trim and install that to the corners for a more stylish look.

Sure, they are heavy, but still my weak arms can move them around to that ideal spot. Which recently became the shed outside. And a small hand truck never hurt anyone when moving them from inside to outside or vice versa.

[JohnH]

Thanks for the tips Brien. Gluing it all together might help prevent "oops, you knocked over my blocks". What do you recommend for an adhesive? Liquid nails or sub floor adhesive, furnace cement

[xSpace]

Yes, any of the described mentioned will hold the blocks together and the exterior sheathing, e.g. sheetrock sleeve, will reinforce the connection.

[JohnH]

I picked up the cement blocks today and set em' up and did a little listening and a sine wave slow manual sweep. I've got some very obvious room modes I can hear at approx 68 Hz and 2x (136 Hz) at the listening position and forward. This correlates to the numbers you'd expect running the math.

The room interior dimensions ended up at L= 16.083 feet width = 13.25' (wide part of room) height = 7.25 This is a 1:1.71:2.08 room. The speakers are set up in the prerequisite equilateral triangle currently with 6 foot legs. (that sounds funny) Listening position is 38% back from the front wall.

While I'm waiting for help to hang the clouds...
How do I further optimize the speakers and or listening positions, (if it's possible)?

Is this bass build-up in the front something that can be fixed with acoustic treatments? Bass traps?

Or is it too soon to tell? Wait until the existing treatments are installed? (Right now they're just lined up along the walls, sitting on the floor.)