Drop ceiling upgrade - AVS Forum
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post #1 of 12 Old 05-11-2014, 06:51 PM - Thread Starter
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I decided to upgrade my HT ceiling by replacing the drop ceiling with a double layer of 19/32" OSB and 5/8" drywall on hat channel and whisper clips. Aesthetics, sound control and in room response were all considerations when making this change. I thought some of you might be interested in my experience so far. In addition to the ceiling therre were some other changes for lights,paint and carpeting (on back order and coming in a few more weeks). I also plan to add another Orbit Shifter next weekend and some custom slanted eights in about 3 weeks.

Here are a few before and after shots







and a few shots along the way







Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9
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post #2 of 12 Old 05-11-2014, 07:02 PM - Thread Starter
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For the sound isolation the change was dramatic for reducing SPL upstairs in the house. I do not have measurements but now you can only hear low rumbling bass even when playing near reference. This is huge for me since sometimes I listen to music or movies when the family is upstairs watchinng TV or sleeping.

As for the in room response it is interesting. I did some measurements a few days before I started the demo. The I put everything back together with the same equipement and setting. I noticed increased SPL of 3-5dB in the 50-150hz region and also faster bass decay in the 35-50hz range. More bass with equal and faster decay times is very welcomed. The red waterfall and spl lines are with the new ceiling the blue is drop ceiling.




Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9
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post #3 of 12 Old 05-11-2014, 07:27 PM
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Nice Lance.. Can't wait to come up next year again. And can't definitely wait to see your finished HTC with 3 OS.. smile.gif
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post #4 of 12 Old 05-11-2014, 07:32 PM - Thread Starter
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thanks Rhed and looking forward to seeing you next year. Maybe we can take a road trip up to my theater and have a JTR party next year when your here for Axpona.

Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9
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post #5 of 12 Old 05-15-2014, 02:53 AM
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lbrown, do you think it'll work without whisper clips? I mean, just have a drop ceiling with plywood and pink fluffy in the middle?


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post #6 of 12 Old 05-15-2014, 03:54 AM - Thread Starter
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Cool, not really sure how you would do a drop ceiling with plywood but if you mean standard two layers without clips the performance is pretty well documented for sound isolation ( much less at lower freq), for in room response I think the clips are very important for the flexing action. I think the key is moving mass, so without the clips you still have the mass but much less movement.

Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9
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post #7 of 12 Old 05-15-2014, 05:42 AM
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Quote:
Originally Posted by lbrown105 View Post

Cool, not really sure how you would do a drop ceiling with plywood but if you mean standard two layers without clips the performance is pretty well documented for sound isolation ( much less at lower freq), for in room response I think the clips are very important for the flexing action. I think the key is moving mass, so without the clips you still have the mass but much less movement.

I mean just use ply wood and glue them to a 2x4 structure on my ceiling.

Thanks for the info about flexing


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post #8 of 12 Old 06-15-2014, 05:50 AM - Thread Starter
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Here are some of the latest pics. Still need something (diffusive or absortive) on the front walls left and right of the screen. The darker carpet was like getting new carpet and a projector upgrade all at once. Much less screen light reflected in the room with the darker carpet so the picture image pops more.
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J likes this.

Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9

Last edited by lbrown105; 06-15-2014 at 05:57 AM.
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post #9 of 12 Old 06-15-2014, 09:48 AM
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Quote:
Originally Posted by lbrown105 View Post
Here are some of the latest pics. Still need something (diffusive or absortive) on the front walls left and right of the screen. The darker carpet was like getting new carpet and a projector upgrade all at once. Much less screen light reflected in the room with the darker carpet so the picture image pops more.

WOW! I'm so jelly.. Nice room Ib.
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post #10 of 12 Old 06-15-2014, 12:03 PM - Thread Starter
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you are too kind Rhed. How much longer for your new mains?

Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9
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post #11 of 12 Old 06-15-2014, 03:02 PM
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you are too kind Rhed. How much longer for your new mains?
Didn't ask Jeff.. I know his busy. Plus I still have yet to order the brackets from the site you sent me. I guess I should order em tonight. And work on them this week.
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post #12 of 12 Old 06-15-2014, 06:10 PM - Thread Starter
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Quote:
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you are too kind Rhed. How much longer for your new mains?
Didn't ask Jeff.. I know his busy. Plus I still have yet to order the brackets from the site you sent me. I guess I should order em tonight. And work on them this week.
post some pics as you start getting stuff set up. check out the house curve I set today. It is based on equal loudness profile. Been trying that vs a more flat approach. Loudness curve is winning!
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Pre-Pro: Emotiva XMC-1, DSP: Mini DSP 2x4 balanced
Amplifier: Sunfire TGA7400, Lab Gruppen FP10000Q
Speakers: JTR Noesis 212HT (LCR), JTR Slant 8's (surrounds), 3 Orbit Shifter LFU's
Sources: PS3, HTPC, Dish Network
Projector: Epson 8350
Screen: Seymour XD AT 138" diagonal 16:9
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