Keith Aschenbrenner, proprietor of Auditorium 23, based in Frankfurt, Germany, has long been associated with the people and products of Shindo Laboratory: From the early 1990s until the EU's 2006 implementation of the RoHS 1 regulation, which banned the sale of various old-style electrolytic materialsand thus most of Shindo's productsAuditorium 23 was the brand's European distributor and, arguably, one of its most empathetic and enthusiastic retailers worldwide. Throughout that time, and continuing through to today, Aschenbrenner has also worked as a designer and manufacturer of Shindo-friendly ancillaries and loudspeakers.