How can the sound of tube devices be specifically upgraded with better coupling capacitors?

With high-quality coupling capacitors, the sound of many tube devices can be improved further. This applies, for example, to units such as the Musical Paradise MP-701 and MP-301 tube preamplifier, older Experience Electronics concepts, many imported tube devices from the Far East, as well as some tube DACs or Dynavox preamplifiers. For such applications, high-quality film capacitors such as Mundorf MCap Supreme EVO Silver Gold Oil are particularly interesting. Mundorf itself describes the Supreme EVO series as a combination of very good impulse response and pronounced spatial imaging. In suitable devices, this can contribute to more fine detail, better quietness and a more coherent reproduction.