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Made a start on my DIY Atmos speakers. Will have a 7:2:4 setup.  

The design is by Paul at Red Spade.  He supplied the 8" coax drivers,  these will be a good match for the 8" coax midrange in my Seaton Catalyst 12's. I intend to eventually rebuild my 4 surrounds using these drivers. 

Paul has hand made the passive cross overs.

My ceiling is on two levels, raised 340mm at the front of the room. Left and right of the raised part is the same hight as the rear. The two front Atmos speakers will be mounted on the raised part with the baffle at the same hight as the lower level. These have a shelf port facing up.  The two rears will be mounted in the lower level with the baffles flush with the ceiling. These will have a down facing port.

 

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Started to cut the panels.

 

image.jpeg

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IMG_4807.thumb.JPG.66a6c850dc14d90819ee9c48fe2b9d3f.JPG

Cut a dummy hole to check dia. Recess is for flush mounting the driver.

Made up a bit of a jig to hold the baffles. Baffles are two pieces of 18mm MDF glued together.

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Cut a 45 degree on the inside of baffle.

 

IMG_4813.JPG

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Mock up to see how it fits. 

I decided to use a 45 degree mitre joint on the sides that you will see. More tricky this way, you will see the joints on the top, which will be facing down, but will be covered with grille. These will end up just painted matt black same as that part of ceiling.

 

 

IMG_4809.JPG

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The rear baffle, still have to be trimmed to size. These have the front port. This will be the only bit you see, the rest in the roof cavity. I have to build a mounting frame to support them, decoupled from the ceiling with four pads of sorbothane.

 

IMG_5055.JPG

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Put the first one together but didn't glue the back yet, just sat it there to hold it all in the right place.

 

IMG_4817.JPG

Edited by SandS

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A bit hard to see but painted the in side of the end where the shelf port goes.

 

IMG_4835s.jpg

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The shelf port rounded off and painted ready to be glued in place

IMG_4842.JPG

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I thought I would make a jig this time for cutting a hole for the binding post block. Have these four to do, and will be making four new surrounds as well.

Just clamp the jig in place.

 

 

IMG_4836.JPG

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I thought I would make a jig this time for cutting a hole for the binding post block. Have these four to do, and will be making four new surrounds as well.
Just clamp the jig in place.
 
 
IMG_4836.thumb.JPG.32cdebe4a7b4c2b5de2d4fc24a3ad753.JPG
Love a good jig

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And then wiz round with the CNC router. Well the STU router.

 

IMG_4837s.jpg

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6 minutes ago, Upfront said:
9 minutes ago, SandS said:
I thought I would make a jig this time for cutting a hole for the binding post block. Have these four to do, and will be making four new surrounds as well.
Just clamp the jig in place.
 
 
IMG_4836.thumb.JPG.32cdebe4a7b4c2b5de2d4fc24a3ad753.JPG

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Love a good jig

Yes, it works out better than just clamping straight edges and stops on if you have more than one to do.

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51 minutes ago, jamiebosco said:

Looking good mate!

I reckon these changes will take the room to the next level!

Looking forward to seeing more

Yes, I'm looking forward to hearing more.

You started it, giving me those Atmos demo files...

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2 minutes ago, SandS said:

Yes, I'm looking forward to hearing more.

You started it, giving me those Atmos demo files...

haha. Well don't tell Sue that..... I won't be welcome back!

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Rounding Over the edges of the Shelf Port.

Could of done with a slightly bigger radius but that's the biggest bit I had on hand. 

IMG_4846s.jpg

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Don't look too bad

IMG_4848s.jpg

Edited by SandS

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