I was at Axpona this year where they launched some new Borressen towers, $280K/pair. I listened to an executive's lengthy preamble before they let the speakers loose, and he went on and on about all the marvelous things they did to make the speaker sound good. For example, they make the woofer driver baskets out of 3D printed zirconium (at $3k per driver), and they went out of their way to avoid aluminum since "aluminum sounds bad"- and he was talking the electrical signal path, not the cone material. Lots of crazy talk about how some metals sound better than others. So, before he turns on the speaker, he instructs us to listen to the superior transients of this loudspeaker, and what does he do: he puts on some techno music!