Tweeter advantages – From Franck Tchang come two add-on super tweeters in magnesium-alloy and pure (not plated) diamond membrane options. There are selectable 15kHz and 18kHz high-pass filters and sensitivity is 90dB/91dB respectively. In either case, omnipolar response goes out to 35kHz/75kHz and finishing is Maple or Walnut as shown. Pricing is €980/pr for the magnesium-alloy version and €5'800/pr for the luxury diamond. Both models are part of Franck's new Avantages Audio brand which also includes the César loudspeaker.