Looking forward to comments on differences (if any, and if so, how much) between the original Aluminum frames and these Composites. I hope they are fairly minor or even imperceptible.
There will be no resonance issues with these. A fully open cabinet like these won't be loaded much, if any at all. There is no outer wing to create anything.
We went with a composite that is slightly denser than MDF, roughly .8 gr/cc. Main issues were strength as there is not a lot of material left between drivers after machining.
This stuff is so dimensionsally stable and nice to machine. On top of that, once it's glued up, it's really one solid piece, the joint becomes part of the material itself.
We also put a lot of emphasis on attention to detail so nothing looks overlooked or unfinished. Every exposed edge, even on the bases has been finished with a tight, 3.175mm radius. All driver cutouts have a large radius on the rear side along with a very tight bevel around the front side so after mounting drivers it will be ever so slightly apparent.
We've consulted with Danny throughout this design process, I'm confident these will be easily measure up