I will be comparing some different output coupling caps in the next few days. I think the polycarbonate caps in general are better sounding than the basic MKP (like the WIMA and Audiophiler). The Jantzen Superior Z-cap are also MKP, but they use a special winding technique, and they sound better than all the other caps I have listened to so far. I need to go back and compare them. They sound more forward in presentation, but that may resolve as they break in. They are very low loss throughout the range. The Jantzen are a lot more expensive. This is another one I am trying.
Hardware: RPi Zero W | Allo Kali | ProtoDAC TDA1387 X8 | PGA2311 | Icepower 500ASP | Harbeth SHL5
Software: Moode 8.3.3
Source: Win 10 NAS
Software: Moode 8.3.3
Source: Win 10 NAS