Agree Ludwig, they are desirable, luckily for me, I have hearing threshold also to the well known 20KHz or even below (my guess is more like 16/17KHz). So I can stick with what is used in the studio, rather Aluminum or Titanium blush

Cheers, Andreas
My Meridian history 565/519 (1996), 861 (2000), to G68ADV, to 561 today, tri-axial cardioid studio monitors, self build acoustic measures, ceiling sails, corner bass traps, trial Helmholtz resonator, REW, Apple (TV, Mac, IPAD), SBT, Calman