Acapella Duke: an open window

The Acapella Duke are one of the finest set of speakers I have ever heard, the best I've ever owned and almost certainly the definitive choice for my home office / hi-fi room (the audio system I call S4). They sound to me like an open window on recorded sonic events. The rest of S4 will be defined and refined in the future, hopefully by 2022, but the foundations are already laid. There are two men in Duisburg, Germany to whom I owe the deepest gratitude. Thank you, Alfred Rudolph and Hermann Winters.