Under Garage Home Theater Build

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Bill Fitzmaurice
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Re: Under Garage Home Theater Build

#61 Post by Bill Fitzmaurice »

No, because you can only tune it to one frequency, whereas the cancellation modes in the room take place at different frequencies throughout the room.

ecut1
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Re: Under Garage Home Theater Build

#62 Post by ecut1 »

I'm installing a row of upper cabinets against the ceiling along the back wall this weekend. They're 20"x20" mounted just below the ceiling the full width of the room. I'll glue them together with PL when I assemble them. All the equipment including the projector will be moved there to allow a back row of seats to be installed. Any ideas of ways to decouple the cabinets from the wall to help with vibration? I'm thinking maybe just a strip of rubber along the top and bottom screw plates between the cabinet and the wall.

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Bill Fitzmaurice
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Re: Under Garage Home Theater Build

#63 Post by Bill Fitzmaurice »

With the solidity of that wall bolt them to it with anchors.

ecut1
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Re: Under Garage Home Theater Build

#64 Post by ecut1 »

Your subwoofer makes the wall move! :lol:

ecut1
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Re: Under Garage Home Theater Build

#65 Post by ecut1 »

I'll glue them together really good and anchor them with some large hex head screws. I probably should have put my wall studs 16" or 12" oc in that room. The sheetrock vibrates a bit between the 24" oc studs.

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Bill Fitzmaurice
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Re: Under Garage Home Theater Build

#66 Post by Bill Fitzmaurice »

24" centers? Ouch. I'd add a second layer of sheetrock, glued to the first.

ecut1
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Re: Under Garage Home Theater Build

#67 Post by ecut1 »

It's all taped, textured, and painted now. It got framed 24" oc when the rest of the basement did, I didn't even think of it at the time. 24" is pretty standard for cold walls in a basement around here. They're all anchored to the concrete foundation in the middle. I still get some movement in the sheetrock between the studs though. I guess I could add a layer of sheetrock just behind the cabinets. Or better yet, I could add a layer of 3/4 inch plywood glued to the sheetrock just behind the cabinets.

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Bill Fitzmaurice
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Re: Under Garage Home Theater Build

#68 Post by Bill Fitzmaurice »

It's not behind the cabinets that's the problem, it's the entire wall. Time will tell.

ecut1
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Re: Under Garage Home Theater Build

#69 Post by ecut1 »

The theater rebuild is coming along. Cabinets are hung, no lacquer yet. I have the riser mostly finished. The first level is 14", second level is 21" - just enough to clear the THTLP. The first level is built with 2x6's spaced 16" oc and spanned 7.5 feet. Every joint and surface is glued with PL Premium. One layer of subfloor feels nice and solid, I really don't know why so many people insist on two and three layers of subfloor. At $76 per sheet I'm going to settle for one layer. I filled the whole thing with pink fiberglass insulation. When the THTLP really gets going there's quite a bit of tactile feel in the lower level of the riser (where the span is 7.5 feet). I guess I might not need butt kickers.
The cabinet doors are made for glass but I'm going to lacquer them black and put speaker fabric where the glass would normally go. The hole in the floor in each corner is going to be covered with basically a cloth covered frame (opposite the side wall) and a cabinet door with speaker fabric. The THTLP will get covered with a hatch door like a crawlspace. There will be a row of 4 theater rockers mounted on top of that hatch door.
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Bruce Weldy
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Re: Under Garage Home Theater Build

#70 Post by Bruce Weldy »

Wow! I bet I Love Lucy reruns will be great in there! :noob:

Great work.

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"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."

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