The Eros and the Campfire cables are fine. A lot of brightness or sibilance in my case were related to choices of tips. The Trifecta is very picky with them. Patience pays later on with the right ones.
Campfire Trifecta cable recommendations
After 200 hours break in Campfire Trifecta sounds bright using iBasso and iFi headphone amps. With the supplied balanced cable, the Trifecta sounds better - less bright. Campfire suggests switching to an all copper cable. Any and all experience using balanced all copper cable with this IEM would be much appreciated. In particular has anyone tried Cardas Beyond Clear? (even though it has some silver it is mostly copper)
* Campfire Solaris sounds fine with iBasso and iFi. It's the Trifecta that sounds bright.