Yeah… it’s hard to say for sure since I don’t have the same exact gear. I do have the Aeon Open Flow which is rated at 13ohms with a sensitivity of 93db and a Creative Sound BlasterX G6. While it drives the Aeons more than loud enough, it sounds harsh and grainy compared to the Magni 3+ and the tube amp I have. It could be a similar scenario or the XS just aren’t to your liking. That’s the difficult part about this hobby.