Magicos are chesty

The problem is that polypropylene is non-fibrous and tends to store rather than dissipate acoustic energy so it vibrates characteristically - not a good material either for a speaker cone

Wrong. It and paper are the best materials for a speaker cone. Go listen to the Stirling Broadcast LS3/6 and then claim plastic is a poor driver material. They can likely embarrass whatever speakers you're listening with.

Audiophiles and Men like chesty speakers and ladies . Its the American way !

@helomech

I love the sound of polypropylene cones. My first higher end speaker was Energy Pro 22 with a poly mid-woofer woven onto a rubber surround.

That said, my experience is that polypropylene cones almost always sound more rolled off in the 1 to 3 KHz range and more lively around 200 to 300 Hz (a more “chesty” sound). This gives them a “warm” characteristic versus pulp/paper which has a more lively sound. Both can sound good.

In the case of Magico, from internal pictures it seems they use a large internal washbasin size plastic cabinet around the midrange. Ostensibly to limit the backwave from the woofer influencing the mid range. I suspect this plastic tub could add a warm chesty coloration - vinyl shower or vinyl bath tub will give vocals that kind coloration should you be inclined to sing in the bathroom.