Hi Snarkyd - Thank you so much for your reply! I'm somewhat encouraged by your experience. If you didn't run into trouble with "double amping" by  connecting to the E12A with you Headphone out on the iPhone, maybe I won't either. Also encouraging to hear that you noticed an improvement in sound...

Just wondering if I've made a mistake ... I use a Galaxy Note 4 as my primary listening device and never listen to anything of less quality than mp3's at 320. I recently took the plunge and purchased a set of Shure SE-535's and figuring that I'd want to get as much goodness out of them as...