This is my personal experience with Samsung product ,i've tried S3 and note3 , with severall app and different IEM ,not mine only for testing, my conclusions?After a test with iPhone 6 plus i have found the solution the sound is quiet good not comparable to a DAP but honest ,the only problem for iphone is the volume that is low in power ,with my shure SE215 is enough ,if you want you can try a different source and you will be able to hear the difference ,obviously is my opinion