Which material sounds better for speakers construction? Wood, Ply or MDF?

I built a pair of back-load horn single driver speakers last summer using the Madisound BK-16 kit design but modified it a bit and doubled up on the baltic birch side and top/bottom panels in the enclosure. The back panel and the front baffle were already double sheets. They came out great and sound real good with decent bottom end but took weeks to break in. I would have put some damping sheets between the panels but I learned about them after it was all done. May be next time. I may be old school or an amateur but I never warmed up to MDF except for shelving in my closet.

“Give it up dude, you obviously have not the slightest understanding of speaker physics. I'll await your reply with a claim of BS credentials”

I know this was targeted at someone else but if you don’t have anything productive to add to the conversation you should just skip this thread and move on. If you feel real strongly about your speaker design knowledge/skills, write a paper and send us the link. Personal insults are not welcomed here.

Magic M3 weighs a healthy 320 lbs. each! Looks like the CF “panels” are more like an esthetic touch than structural. And the (internal ) aluminum bracing is quite extensive and incredibly impressive. 

“Why Magico is made out of aluminum? Probably because it is cheap.”

Whether aluminum is cheap or not is besides the point. If you look at all the complexities in the internal bracings that are used and machining of all those pieces and the time and cost to assemble everything you’ll get a picture why they cost so much. It’s certainly hell of a lot easier (and cheaper) to run MDF boards through CNC machines and glue them up together, even when every other component, e.g., drivers, crossover parts, etc., are the same.