I was talking with my friend about IEMs with my S4s in my hand when I came up with this idea. The Klipsch silicon tips are oval shaped. Also, the body of the S4 is oval shaped. However, the ovals don't overlap with each other when you put the tips on the right/original way--they are 90 degrees off from each other. Put the tips on the normal way, then just rotate them 90 degrees in any direction. I haven't listened to them like this very much, but with the tips installed 90-degrees off, I think I've noticed, in order of significance: (1) much more treble detail and volume (2) better isolation (3) marginally better bass extension too, and a very slight decrease in midrange. I believe these are all because this way, the IEMs can go further into your ear than before. Can others try this and tell me what they think? Again, what you do is rotate the tips 90 degrees (any direction), so the oval shape of the tip corresponds with the oval shape of the body.