Interesting observations. I have yet to open my box of zs3s I received on Thursday. Correct me if I'm wrong but if the zs3s are glossy on the outside, that's a newer batch without the tuning foam?
I was actually thinking of not removing the foam just cause I don't want to screw anything up (even though it seems easy the hardest part from what I gather is removing the screen)
Also I like the low end of the spectrum, sub bass the most. Being that I listen to rap well over 90% of the time, being able to hit the low notes is of vital importance to my listening experience.
And according to you the bass hits harder with the foam in the nozzles? I don't like punchy bass, I'm talking more along the lines of Earth shattering quake bass. Which when you said boomier bass assumed you meant less punchy and more like the bass I enjoy. Because again correct me if I'm wrong but removing the foam increases the mids and treble whilst at the same time lessening the bass. Seems like the opposite of what I'm looking for. But it makes sense why it's popular to do with guys here because they're looking for a more balanced neutral sounding earphone that represents the full spectrum accurately.
Well one things for sure if I like the ed4s then I can't wait to listen to the atrs and the zs3s which are supposed to be much better sounding earphones.