Oh man, I wouldn’t want to use the dongle with highly sensitive IEM’s or ear buds at all. It’s going to be hiss hiss hiss all day. It’s tolerable on the included Revolver S headphones but it ramps up pretty quickly on more sensitive pairs. I’ve tried it with ear buds and with a Cloud Stinger, which is quite senstive…and I wouldn’t recommend it.
The best headphone I’ve got around my office right now is the DT770 250, so that’s the only “higher quality” driver I could test it with, sorry! I’ve had some other nicer pairs in for review…but I’m self-funding my whole journey, so if I don’t totally love something, I sell it to a friend.
Thanks so much for reading and your replies! Sounds like you know your stuff and you’ve been having a good time listening.