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post #571 of 588 Old 07-18-2016, 09:42 PM - Thread Starter
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Chuck,

So when are you coming to Sydney to see it in person ??!!

The ceiling construction is pretty straight forward. Essentially its just deep steel channels hanging below the double drywall, with rockwool fill, black fabric and then slatted timber.







Cheers,
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post #572 of 588 Old 10-04-2016, 06:40 AM
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Hi Peter,
Beautiful theater, thanks for sharing so much with everyone.

Would you mind sharing the dimensions of your soffit and the horizontal and vertical spacing between it and the slatted ceiling bass absorber? I love the look but am trying to understand the proportion of everything together. Happy to extract the dimensions (and share them back on the forum) if you wanted to send your SketchUp file. I'm sure lots of other folks would love to see the various dimensions, as everything looks so good together in your theater.

Either way, many thanks in advance!

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post #573 of 588 Old 10-04-2016, 08:25 PM - Thread Starter
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Hi texpilot,

I'm quite happy to send you my Sketchup model for dissection and analysis !

Send me your email address via PM and it's all yours.

Cheers,
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post #574 of 588 Old 10-06-2016, 04:51 AM
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Hey Peter

Getting all materials ready for my project. do you have an pics of the sides of the doors and the frames. curious to see what the door and door ways look like when opened, as I'm trying to figure out how to treat the edges

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post #575 of 588 Old 10-06-2016, 09:04 PM - Thread Starter
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Unfortunately my build was a bit photo challenged !

Here's all I can show you -









Hope it helps.

Cheers,
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post #576 of 588 Old 10-07-2016, 09:29 AM
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Quote:
Originally Posted by Peter M View Post
Unfortunately my build was a bit photo challenged !

Here's all I can show you -




Hope it helps.

Cheers,
Thanks a lot Peter

*IF* you happen to get a chance could you tale a picture of the front edge of the door while it is open. Bit puzzled by the one above, as I was expecting the panel to come all the way to the edge of the door

TIA

Mark

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post #577 of 588 Old 10-07-2016, 03:44 PM
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Quote:
Originally Posted by Peter M View Post
Unfortunately my build was a bit photo challenged !

Here's all I can show you -









Hope it helps.

Cheers,
On the door is that wood frame or steel like the roof set up?


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post #578 of 588 Old 10-08-2016, 05:30 PM - Thread Starter
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Quote:
Originally Posted by MalevolentHamster View Post
Thanks a lot Peter

*IF* you happen to get a chance could you tale a picture of the front edge of the door while it is open. Bit puzzled by the one above, as I was expecting the panel to come all the way to the edge of the door

TIA

Mark
Hi Mark,

Here's a couple more I took just now ...





Cheers,
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post #579 of 588 Old 10-08-2016, 05:33 PM - Thread Starter
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Quote:
Originally Posted by 3rotor View Post
On the door is that wood frame or steel like the roof set up?
The door frames are steel. There's also a couple of steel layers within the door.

Cheers,
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post #580 of 588 Old 10-08-2016, 06:03 PM
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Quote:
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Hi Mark,

Here's a couple more I took just now ...

Cheers,
PERFECT!

just what I was looking for. Thanks a million

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post #581 of 588 Old 10-09-2016, 10:03 AM
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Quote:
Originally Posted by Peter M View Post
Bass absorber baffle is finished, soffits finished, ceiling baffle insulated, downlight wiring done, speaker wire in, column framing underway, one speaker hole cut in baffle wall ...



Cheers,
Hi Peter, three questions sir:

1. How is the rockwool suspended/supported to stay in the ceiling baffle? I can't make it out in the pic.

2. What is inside the soffits? Anything? I don't find any pics of them before they are sheeted, and I don't see any vents cut in them for absorbing bass. So, just curious!

3. What brand/model are the lights you used in your soffits and the ceiling slats? I want to put narrow spot lights directly over our seats that can dim super low -- low enough to not affect the picture but just enough light to see your lap in a dark movie scene. I call it "popcorn lighting." Yes, I have two boys LOL

Thanks again for sending me your Sketchup model! I'm still going through it for dimensions.

Cheers,
Terry

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Last edited by texpilot; 10-09-2016 at 10:08 AM.
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post #582 of 588 Old 10-09-2016, 06:44 PM - Thread Starter
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Quote:
Originally Posted by texpilot View Post
Hi Peter, three questions sir:

1. How is the rockwool suspended/supported to stay in the ceiling baffle? I can't make it out in the pic.

2. What is inside the soffits? Anything? I don't find any pics of them before they are sheeted, and I don't see any vents cut in them for absorbing bass. So, just curious!

3. What brand/model are the lights you used in your soffits and the ceiling slats? I want to put narrow spot lights directly over our seats that can dim super low -- low enough to not affect the picture but just enough light to see your lap in a dark movie scene. I call it "popcorn lighting." Yes, I have two boys LOL

Thanks again for sending me your Sketchup model! I'm still going through it for dimensions.

Cheers,
Terry
Hi Terry,

1. The rockwool was simply cut over-size and wedged into place. This was quite OK to hold it there until the fabric and timber went up.

2. Nothing inside the soffits and no acoustic vents in them - only HVAC.

3. All the downlights are Clipsal. At the time (four years ago) the only LEDs that Clipsal would allow on dimmable C-Bus circuits were their own. They dim OK to about 20% but below that they're not reliable. LEDs have come a long way since then and I have no idea what may be available now. I have six circuits for the downlights - front / sides / rears / each of the 3 rows in the slats. For listening to music and watching sport I tend to have just the sides on. Turns out I very rarely use the ones in the slats.

I'm glad the Sketchup model is proving useful !

Cheers,
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post #583 of 588 Old 10-15-2016, 08:59 AM
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Quote:
Originally Posted by Peter M View Post
2. Nothing inside the soffits and no acoustic vents in them - only HVAC.
Whaaaaat?!? Mind blown! No bass absorption in the soffit??? Is THAT how beneficial a (properly designed by a skilled acoustician for your room and speakers) baffle wall is? Combined with the golden ratios in room size perhaps? Do you have bass absorption at the rear of the room?

Just goes to show how little I really know about acoustics despite all the reading I've done lately!

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post #584 of 588 Old 10-15-2016, 04:51 PM - Thread Starter
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Hi Terry,

The whole of the slatted ceiling is a bass absorber, plus there are vents in the corners that use the riser as a bass absorber, plus there's my secret weapon - the large empty space on the right of this plan view -



actually looks like this -



I guess with all this going for me, Dennis didn't need to use the soffits !

Cheers,
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post #585 of 588 Old 10-16-2016, 10:30 AM
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Quote:
Originally Posted by Peter M View Post
Hi Terry,
The whole of the slatted ceiling is a bass absorber, plus there are vents in the corners that use the riser as a bass absorber, plus there's my secret weapon - the large empty space on the right of this plan view -

actually looks like this -

I guess with all this going for me, Dennis didn't need to use the soffits !

Cheers,
Secret weapon indeed! I had wondered what that space was for once but forgot about it.

As for the slatted ceiling, I LOVE the look but must confess I don't understand its effectiveness as a bass absorber because it it isn't at the room boundaries where the pressure is greatest. Maybe with the rock wool and air gap it absorbs "enough" as the wave travels from front to rear of the room ...

And I forgot about the riser, duh! That's a lot of bass absorbing right there given its total size and height. Thanks again Peter.

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Last edited by texpilot; 10-16-2016 at 10:53 AM.
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post #586 of 588 Old 10-16-2016, 07:41 PM - Thread Starter
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Terry,

Each of the bass absorber elements will have a different absorption spectrum. I assume the ceiling is most effective at mid bass frequencies whereas the LF baffle at the rear is for very deep bass.

I didn't quiz Dennis too much on this - I just built what he designed !

It seems to work as I've never noticed any bass "boominess".

Cheers,
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post #587 of 588 Old 10-16-2016, 10:36 PM
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Quote:
Originally Posted by Peter M View Post
Each of the bass absorber elements will have a different absorption spectrum. I assume the ceiling is most effective at mid bass frequencies whereas the LF baffle at the rear is for very deep bass.

Thanks Peter, that makes sense. What is the material inside your riser (pink fluffy?) versus what is inside the LF baffle?



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post #588 of 588 Old 10-16-2016, 10:52 PM - Thread Starter
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What is the material inside your riser (pink fluffy?) versus what is inside the LF baffle?
Apart from the two layers of HD fiberglass in the LF baffle, it's all rockwool.

Cheers,
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