DIY speakers, need advice

[wencheng]

Wow that is nuts, looking at the left pic, almost looks like it's 2 inch thick aluminum...! How much would just 5 feet of that weigh and cost?!

the weight of the 5-foot long aluminum cylinder with a 2-inch thick wall and a 240mm outer diameter would be approximately 872.07 lbs.

Cost just for raw alu ~$1000

Yep that would be the way! I misunderstood 'rings'. I thought the cylinders would have a reasonable thickness of something like a quarter inch or less... The 3D printing stuff started off on how you would attach the drivers to the cylinder, so as there likely wouldn't have been been enough material to remove it would have required some sort of adapter/bracket system.

But with 2 inch thick alu there's likely plenty of material to remove with CNC as to create a flat front baffle for the drivers and have plenty of thickness left, so create similar front baffle like https://ca.kef.com/products/muon and yep, just CNC the front baffle as to directly integrate the drivers flush!

Man, 1 ton per speaker... Hurts my back and floor just thinking about it.

One of those ideas
Maybe I'll have something else in mind