Ya on se I notice minimal difference going to high gain with my sony ex1000. I ordered pentaconn 4.4 connectors saturday can't wait to try the balanced out on the ex1000 and my denon d2k. Se sounds great to me over the fiio X3i I had and even over the ifi micro black label I owned,so anything more going balanced will just be icing on the cake. The previous owner of the zx300 already burned in the Se over 200 hours, but not the balanced. Not really sure if I believe in burn in or not here, but maybe I'll notice a difference burning in the balanced since I've already became accustomed to the sound sig of the player. I also have solely used the zx300 and ex1000 the last week, no other amps or hps and plan to keep it that way to see what differences I may notice. Not sure how much different the fiio x3i is from the x3ii, but the zx300 just destroys the x3i to me, especially on the ex1000 being such a detailed iem.