A Big'un - the Audio Nirvana Super 15

I suspect you're right !

the shelf braces are coming along...
 

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it certainly takes some time and effort to make a lot of holes !

anyhow, the major braces are now installed along with cleats(?) around the back which I will use to bold the back panel to for testing.

The next step is to install a set of small braces to reduce the size of unsupported spans.
 

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Thanks !

I've been adding more bracing, gluing ribs against the sides in order to increase the stiffness. It's already feeling very solid. The day job gets in the way a fair bit but I'm going to focus on the bottom of the speaker next - I want to glue on a piece of the back panel, just the first foot or so in order to provide a place to mount the speaker terminals and to provide another level of stiffness. I've added what nearly amounts to another shelf brace near the bottom but of a frame type not 'holey'.

The rest of the back panel will remain removable so that I can try it as an open-back speaker and also to allow ease of access to finish it off.
 
I'm placing extra ribs in parallel with the long direction of unsupported panels. These are nothing fancy, using up scrap pieces of wood left over from the build so far. They don't need to be positioned too accurately, in fact you want some variation around the box so that no two panels are the same.
 

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I'm placing extra ribs in parallel with the long direction of unsupported panels. These are nothing fancy, using up scrap pieces of wood left over from the build so far. They don't need to be positioned too accurately, in fact you want some variation around the box so that no two panels are the same.


Good shout on the little extra ribs, especially as the panels are so large. They work best if they are a different material (normally harder) from the panel itself, but as you have the holey braces in as well you'll be good to go.

Cant wait for the first play!!
 
Good shout on the little extra ribs, especially as the panels are so large. They work best if they are a different material (normally harder) from the panel itself, but as you have the holey braces in as well you'll be good to go.

Cant wait for the first play!!

yes, it will be something to look forward to - the driver is in my cold storage room (Canadian houses are still built with these things) playing an empty FM channel so they are breaking-in whilst construction continues.
 
I have chosen to use Silicone to attach the outside panels to the box. Hopefully, I'll be able to router-trim the edges of the inner box, clean it up, and attach a 2' x 2' panel to the top of the box using Silicone. It's a 100% Silicone glue, no additives. I've calculated that I need one tube for a 2' x 2' panel for a layer thickness of just less than 1mm.
 

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