Maybe too crazy?

Am i a mad if i use Rigid Polyurethane Foam as bass traps enclosure material instead of MDF? Ah! Don't beat me! :) Marco.

Not sure what that would do - it would probably flex more than the MDF, but when absorbing bass that's not always a BAD thing. If you're that crazy, why not build one and let us know how well it works?

Hi knightfly, i was too curious so tonight i've built a sandwich like this: 1 - 1x2 feet, 1" thick rigid poly (the back). 2 - 1x2 feet, 1" thick rigid poly center cut in order to obtain a 1,2" frame. 3 - 1x2 feet, 2" thick rigid fiberglass panel (0.85 sabins average). 4 - 1x2 feet, 1" thick rigid poly center cut in order to obtain a 1,2" frame. 5 - 1x2 feet, 4mm thick plywood panel. I've built 2 units and i'm testing it right now using a Cubase project i've done months ago containing several test tones (sine sweeps, pink noise etc.). I let you know... Bye!

I think a picture is better than a thousand words...