Thanks for the reply @Deezel177. It's not just the treble though. The no 5 and OS reduce detail in the mids and lows too. And they add hiss. Do the lionheart and saladin+ keep midrange and bass detail similar and keep the background at pitch black? I imagine a pentaconn connector would help with the hiss...
I gotcha, man. The hiss is probably the strangest part of your impressions. A cable shouldn’t add any hiss, unless the stock cable has a resisitive property that reduces hiss that should’ve been audible in the first place. A plug shouldn’t affect that at all, unless the resistive property lies in the plug. Based on my experience with Pentaconn-terminated cables, that isn’t the case. If what you say is true, I’d have to listen to the 64Audio stock cable first. The Saladin+ has the blackest background of the two because of its 8-wire configuration, while the Lionheart will sacrifice a touch of detail for the richness and thickness it provides to the IEM’s soundscape.