Concert Fidelity ZL-120s. Fell in love at a show and bought a set from Brooks Berdan’s estate a couple of months later. I have them on a pair of Sonus Faber Extremas. I had them updated a couple of years ago as part of a small repair, and it was worthwhile. They became even more resolving. They are one generation behind the current version. A close friend liked mine so much he purchased the current version to drive a pair of Maggie 20.7s. That system sounds astounding.