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***Working Man's DIY Dedicated Home Theater*** - Page 14

post #391 of 604
Don't forget, NO FIBERGLASS biggrin.gif

Glad the ventilation is working well. Keep us updated. I for one am very interested in how your setup works long term.
post #392 of 604
Quote:
Originally Posted by NicksHitachi View Post

I ordered 5 packs of 8 2'x4'x3.5" Roxul safe-n-sound.

May I ask where you ordered this and if they have a distribution avenue here in Charlotte? I have called virtually every single distributor I know and came up aces with finding the stuff this far south. I gave up and purchased the pink stuff, but it is still in returnable condition. Thanks!
post #393 of 604
Thread Starter 
Quote:
Originally Posted by J_P_A View Post

Don't forget, NO FIBERGLASS biggrin.gif

Glad the ventilation is working well. Keep us updated. I for one am very interested in how your setup works long term.


I'm tired of itching.... Spent too much time as of late in my attic rooting around.mad.gif

I hope the panasonic fans are as durable as they touted in addition to the labor they are quite pricey to replace....
post #394 of 604
Thread Starter 
Quote:
Originally Posted by TMcG View Post

Quote:
Originally Posted by NicksHitachi View Post

I ordered 5 packs of 8 2'x4'x3.5" Roxul safe-n-sound.

May I ask where you ordered this and if they have a distribution avenue here in Charlotte? I have called virtually every single distributor I know and came up aces with finding the stuff this far south. I gave up and purchased the pink stuff, but it is still in returnable condition. Thanks!


Yup, I happened upon this as an accident. Lowes can get it.

Click here and do "store pickup" to your local Lowes. They will special order it for you and NO SHIPPING COSTS! Woot.

Its an even better deal if you can come upon one of their coupons, like 10%off or 10 off 50.......wink.gif
post #395 of 604
Quote:
Originally Posted by NicksHitachi View Post

............Its an even better deal if you can come upon one of their coupons, like 10%off or 10 off 50.......wink.gif

You can check with the post office. We got several of those coupons in our change of address packets. I'm not sure if you actually have to change your address to get one of the packs of coupons, but it's worth a shot to find out.
post #396 of 604
Quote:
Originally Posted by NicksHitachi View Post

Yup, I happened upon this as an accident. Lowes can get it.
Click here and do "store pickup" to your local Lowes. They will special order it for you and NO SHIPPING COSTS! Woot.
Its an even better deal if you can come upon one of their coupons, like 10%off or 10 off 50.......wink.gif

Thanks. I had tried that through Lowes only to get a phone call several days later from Lowes corporate that that was not an eligible ship to store item in my area. They cancelled the order and I moved on. Maybe something changed.

Hopefully your order goes through - let us know!
post #397 of 604
Thread Starter 
Quote:
Originally Posted by TMcG View Post

Quote:
Originally Posted by NicksHitachi View Post

Yup, I happened upon this as an accident. Lowes can get it.
Click here and do "store pickup" to your local Lowes. They will special order it for you and NO SHIPPING COSTS! Woot.
Its an even better deal if you can come upon one of their coupons, like 10%off or 10 off 50.......wink.gif

Thanks. I had tried that through Lowes only to get a phone call several days later from Lowes corporate that that was not an eligible ship to store item in my area. They cancelled the order and I moved on. Maybe something changed.

Hopefully your order goes through - let us know!

Oh shoot, dang man sorry to hear that. I haven't gotten a call and it was like two weeks ago...... I'll update if mine comes in without issue.
post #398 of 604
Thread Starter 
Quote:
Originally Posted by NicksHitachi View Post

Quote:
Originally Posted by TMcG View Post

Quote:
Originally Posted by NicksHitachi View Post

Yup, I happened upon this as an accident. Lowes can get it.
Click here and do "store pickup" to your local Lowes. They will special order it for you and NO SHIPPING COSTS! Woot.
Its an even better deal if you can come upon one of their coupons, like 10%off or 10 off 50.......wink.gif

Thanks. I had tried that through Lowes only to get a phone call several days later from Lowes corporate that that was not an eligible ship to store item in my area. They cancelled the order and I moved on. Maybe something changed.

Hopefully your order goes through - let us know!

Oh shoot, dang man sorry to hear that. I haven't gotten a call and it was like two weeks ago...... I'll update if mine comes in without issue.


Dude, major coincidence, they just called and said it was in. You might give it a shot again......confused.gif
post #399 of 604
SuperKate.jpg
post #400 of 604
Great thread to follow. For what it is worth I was able to order Roxul Safe & Sound and Rockboard through my local 84 Lumber. It was relatively inexpensive and they were very flexible in working with me. When I ordered the rockboard it had to be ordered in a full package quantity. They ordered it, broke open the package and let me purchase just one sheet so I could see if I liked it or not. Very good customer service I thought. Don't know if you have those in your respective area, but thought I would mention it.
post #401 of 604
Thread Starter 
Quote:
Originally Posted by TMcG View Post

SuperKate.jpg


Why can't I look away from this......?lol

My contact at lowes said they got it from Prime source:

NORTH CAROLINA - Greensboro 800-488-2294 Greensboro@primesourcebp.com

I have ordered OC703 from SPI products before. They are local and have an office in Charlotte:

Address:
Woodland III 3300-A Woodpark Blvd
Charlotte, NC
USA, 28206

Main Phone: (704) 598-9899
Fax: (704) 921-2950

Email: charlotte@spi-co.com
post #402 of 604
Quote:
Originally Posted by NicksHitachi View Post

Why can't I look away from this......?lol

I know, those glasses are totally distracting, right? wink.gif

THANK YOU for the information. I'll get some calls out this afternoon if I find the time or tomorrow morning at the latest. It will be great to have the insulation I really wanted.
post #403 of 604
Thread Starter 
Your Welcome TMcG,

I spoke with store manager at my local lowes and he said they had no issues getting it, but it all depends on your local market. It really makes no sense to me though.
post #404 of 604
Thread Starter 
OK, I need some help here.

Since moving my projector to the projector box, I have some serious vibrations in the projector image during intense low bass sequences. I only notice it on music since the image is static but its still annoying.


The hush-box is very rigid and mounted solidly. However the old ceiling mount was quite flimsy and I could elicit movement with a single finger! So what gives with all the vibration now!? I did place rubber grommets between the projector box, wall, and soffit into which its mounted. See the Mounting here:

D5CFE378-29B8-43D1-BEC8-63CC5C7E785A-4441-00000B0D42EAB665.jpg

My guess is that since the box is so rigidly mounted the room vibrations are being transferred to the projector. Its not the upper bass range thats the problem, but like 25Hz on down when the room really starts to breathe you can see the projector shaking.

A couple thoughts:

  • mount a plate on some medium density foam to place the projector on in the projector box to de-couple it from the box
  • mount a plate on some springs to place the projector on in the projector box which would decouple the projector from the box.


I've seen both those decoupling methods used in commercial offerings for projector mount de-couplers but not sure if they will work here or how well.
Edited by NicksHitachi - 11/15/12 at 5:05am
post #405 of 604
It sounds like you are hitting your room resonance. I am not sure what the solution is, but do you have the opportunity to use a normal projector mount with downpipe to attach the hush box assembly to your ceiling joists instead of that framed structure?

A first-step cheap alternative could be Vibrapods under the feet of your projector: http://www.vibrapod.com/

By the way - nice THX compliance on your surround speaker location!
post #406 of 604
I think you and TMcG are on the right track. The first step should be the simplest and cheapest. I'd try a rubber isolation mat or the pods mentioned above. If it's a relatively small amount of vibration, that might do it, and you wouldn't be out much time or effort. If not, then you move to the more complicated fixes.
post #407 of 604
Thread Starter 
Thanks for the input on the vibration guys.

I think youve set me on the right track. Im thinking of a plate of granite/marble with sorbothane feet inside the hush box to mount the projector on.......

Meanwhile spent all day yesterday making fabric frames for back soffit. Let me tell you the Kreg Jig is the real deal! Also stuffed the rear soffit with Roxul so it now functions as bass trap and BB absorber due to location.

This Roxul is awesome to work with..... Its quite floppy compared to OC703 and doesnt cut as pretty but its so much nicer on he senses.

Now i gotta find somewhere to stuff all this!

B28291C6-2014-48CD-8A21-74B54AD73D1B-2165-000004E7E5DBA7E0.jpg

Which leads me to my next projects: SOFFITS AND ACOUSTIC TREATMENTS!!! WOOT!

Ill post some final pics of the back soffit once covered later today.
post #408 of 604
Excellent progress! If you have a Grainger close by they have some anti vibration pads as well, something else just to give you food for thought.

Regards,

RTROSE
post #409 of 604
Thread Starter 
Quote:
Originally Posted by RTROSE View Post

Excellent progress! If you have a Grainger close by they have some anti vibration pads as well, something else just to give you food for thought.

Regards,

RTROSE

Hi RT,

Long time no see, been enyoying that projector I bet wink.gif

Thanks, I spent all weekend working on it, makes the weekend go by fast though.....
post #410 of 604
Thread Starter 
UPDATE: More Teaser PHOTOS! biggrin.gif

Filled up the rear soffit with Roxul:

F3DC3CDA-D141-4C82-BF10-0DF470907FD3-2423-000005B6D7C02E75-1.jpg

Fashioned a Bass Trap for the Back corner:

5788172D-7A9E-49E5-8D0B-9BCAD24B21BA-2423-000005B6A6B76EA1.jpg

I'm going to cover the backs of my acoustic treatments with kraft paper, its cheap an will help contain the fibers. Like this:


02BF58F0-45C5-4B7C-B590-DA40C5DC191E-2423-000005B6B2A31B2D.jpg

No glamour photos of the finished product yet, I barely got it all back together before it was time to fire up for evening viewing. I did take a before Photo so It will be interesting to show before and after.

Next up:

  • Soffits
  • Wall Treatments
  • Ceiling Treatments
post #411 of 604
The back corner trap looks good!
Curious; what's the dimensions?
Also; are you planing to put something that is high frequency reflective (plastic / kraft paper, etc..) over the front face?
post #412 of 604
Thread Starter 
Thanks Ed!

Sometimes I wonder If I'm talking to myself here but I'm just as guilty as the next for lurking and not posting.....smile.gif

The Dimensions are 24x17x17. This is the maximum size trap that will fit in the back corner. This size still yields an even number of triangles per 2x4 panel.

I think the 24x24x34" traps are preferred but I've seen 12x12x17 traps used too.....

No I'm not planning to cover the corner trap with reflective covering my room is nowhere close to over absorbed. Its actually already covered with burlap and placed into the theater.biggrin.gif

I have given some thought to the over absorbed issue though. If I use any panel traps at or behind the seating area I am going to either do pressure traps like the one you built or velocity traps with reflective coverings like you mentioned or a combination of the two. This should help keep the room lively, especially behind the listener where some stray sound should help. The back wall is an exception to this rule since my room is so small my only hope here is to totally absorb it.

Here's my treatment theory(Comments/Suggestions Welcome):

  • Build Soffits and fill with broadband absorption.
  • Broadband absorption First Reflection points walls and ceiling.
  • Bass Trap all corners possible(superchunks or panel straddles depending on materials avail.)
  • Broadband absorption entire back wall
  • Broadband absorption entire front wall
  • Measure and interpret Waterfall(modal ringing) and ETC(Early reflections).
  • Treat high gain early arrival reflections with surgical broadband absorption.
  • Severe modal ringing in the 80-500Hz region I would address with tuned pressure traps in high pressure regions.
  • Assess how lively the room sounds and address HF over attenuation as needed.

Broadband Absorption = 3.5" Safe-n-sound with 3.5" air gap.

Pressure Traps = Something similar to Ethan Winer's design found here
post #413 of 604
That's one comprehensive treatment plan.

Much better than my approach:
3 large traps up front, front corners and front ceiling.
1" linacoustic front wall, and the front 1/4 of sidewalls (proscenium area behind curtains)
Then hope for the best....
Oh Yeah; then added pressure trap to back wall later on....

If I could only do it over with what I "think" I know now... smile.gif
post #414 of 604
Thread Starter 
PHOTOS!!!

I'm not a photographer or videographer or editor but theres music and photos.

Total time invested with editing and movie creation ,<1hr so bear that in mind.

Music: Adventure Club Collect Call.
post #415 of 604
^ That "nerd porn" has good music!!! Well done, sir!

BTW, what was the reasoning for mounting the projector low and then putting the two back surround speakers up high vs. the final configuration shown? I am curious to learn.
post #416 of 604
Thread Starter 
Soffits going in.... Made a big ole mess over the holiday.rolleyes.gif

Magnetic-Housekeeping-Signs-43817-ba.gif
post #417 of 604
Thread Starter 
Still working with soffits.... Heres a 360 shot of the room lighting needs work but I like this panarama 360 stuff its useful if you don't have a fisheye lens or wide angle and want to convey a wide viewing angle.....


http://photosynth.net/view.aspx?cid=610cbb40-c9c7-4828-82e0-9504639972a6&m=false&i=0:0:0&c=0:0:0&z=289.541159998597&d=1.80030253120205:2.76536490492398:1.74375056396825&p=0:0&t=False
post #418 of 604
Looking good! The screen looks huge in some of the..... um..... views. Not sure how to describe it when I can pan around like that. It's a cool little tool, and really helps to show what how your room is laid out. A+
post #419 of 604
Thread Starter 
You know that point in a big project when your tired of working on it? I just got there. Im over this!!!! The angled ceiling added a huge amout of difficulty.

Anyways all soffits are constructed. Half the wiring and fixtures are done. Still have the fabric panels to make and upholster and then the crown molding.







Edited by NicksHitachi - 12/1/12 at 5:11pm
post #420 of 604
Looking Good Nicholas - one more "push" and you can kick back and enjoy !
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