The Dynaudio D21 AF is a tweeter that belongs to the Dynaudio driver lineup, commonly used in a variety of speaker systems. It features a 21 mm dome design with a coated fabric diaphragm, which is intended to produce a smooth frequency response and enhance sound fidelity. This model was employed in several Dynaudio loudspeakers and kits, optimizing high-frequency performance in home audio applications. The D21 AF is characterized by its ability to deliver precise sound staging and detailed high-frequency reproduction, making it a favored choice among audio enthusiasts. Spare parts and replacements for the D21 AF can be procured through Dynaudio dealers, particularly for home product ranges.