Ohm Walsh Micro Talls: who's actually heard 'em?

Another sucky day in SoCal, cold but no rain here in Lakewood....

Woke up up with another palm tree broken at the root, this is the second one in less than
two weeks.
Figure a few hours in cold shop would do me good, and by the end of the day I had basically installed all the metal plates in the upper part of the cabinet.
All plates have either a layer of butyl or a mix of butyl and neoprene rubber and to hold it all together I'm using Gorilla glue. This glue is pretty amazing stuff wet it and it slowly filling any voids and giving the layer a cushion to float on. 
After the layers were glued together I figured I would do a knock test to see how the cabinet
respond to being shored up in a proper way. 
Check out the before and after sound and vibration test...
https://www.flickr.com/photos/147883144@N08/shares/0L3pb1

I should have some more stuff tomorrow..........🇸🇪

Back again...

Some more thoughts on the build.
This morning after a nice cup of joe (or two) the thought of materials and
the cost associated with said purchases crossed my mind.
I was looking in to plate Aluminum and each plate would cost me a minimum 
of $300 ( 12"x 12" ) before machining and anodizing/powder coating...Its doable but incredibly expensive in the whole scheme of things. So what can I do to make this a project that someone else could do without breaking the bank? 
It could also be more fun to figure out a better but cheaper way around the problems.
I will have more in a few hours.....🇸🇪

The top plate is growing in complexity and thickness, more layers, more damping
and by this point I would call it bullet proof...
As you can see in the image I made a layer of clay ( yes yes I know it's colorful ) but my 
supply company had a super deal on the colored ones and it's free of sulfur so I can add silicone in the mix later. To lock in the clay I used some carbon fiber sheeting I had sitting around and to dampen the sheet I'm using the checkered neoprene which allows glue to saturate both sides and dampen the interface with the steel and aluminum layers.

Tomorrow will be the first day for bracing.....yeehaa
I was going to use some CF material I have left from another project, but it would take some 
extra time and money as the plates needs to be cut with a water jet. The idea would be some material that can be bored with a forstener bit and possibly jigsawed making it easy and fast. 
So Im stoked and excited as my ideas are coming to fruition, and who knows it might sound
fantastic when all is said and done...

check the images out, before I install the Walsh driver I'll add a layer 
of foam over the CF to quell any reflections.

https://www.flickr.com/photos/147883144@N08/shares/996oGG

Now I'm going for some Tylenols........🇸🇪

Peter, that is a lot of work!
I hope it all turns out well.
After all this effort, I will be interested to hear the result.
Thanks for the photo links; that helps with the visualization.

Its 2:30am and I can't sleep...oh well

After considering the type of cross bracing I want to do, I thought to my self, what's hard, stiff and easy to machine? Got to be easy to
cut, glue and cheap. I was going to use Finnply, great stuff, looks gorgeous when finished.....But really, the idea was to utilize less expensive materials in the cabinet that can be found at HD or Loews. So I will use this tempered underlayment 1/8" thick hard as nails and stiff.....PERFECT.
I'll make a sandwich construction of the board and a mix of different
soft materials, it'll be easy to cut, drill and shape with a router.
I did find some aluminum extrusions from another project in the back so I'll use that for corner bracing (why not it isn't costing me much). 

Any way back back to sleep......🇸🇪