Not much to say about these that hasn't been said. They really shine with an amp though. They sound very nice out of the Magni2, But to my ears they have more presence and just sound slightly better from my old Shellbrook Super Mini Moy. Comfort is acceptable. Isolation is amazing, I've used these on flights out of my old Sony A726, Very nice. Vacuuming while wearing these is a little spooky, I could easily kick the cord from the wall and not know. I bought these from amazon as a cosmetic blemish item for $129. I lucked out the out side box had some slight damage, but the inner contents were pristine.
Reviews by Dobber
Briefly, the differences I heard between the 1350 and the ER4S were:
Ety - much lower distortion through the upper mids and lower treble, more natural frequency balance throughout bass/mids/treble. Bass a little light but more like the real thing. There was a boomy PA set up for announcements and the Ety's were much like the real thing.
Beyer 1350 - hooded-sounding, i.e., sounded like a moderate treble roll-off and the upper mid/lower treble detail was just not really there. The sensation was of a slow transient response. Bass slightly raised but admirably clean and extended compared to almost any other headphone I have listened to. I really like the bass on these, even if in direct comparison the the Etys it is slightly raised in level (like a shelving boost). What was most bothersome, though was what sounded like a relative ton of added distortion right where we are most sensitive to it: 300-4000Hz, at a guess.
The Beyers still have their value as something to offer clients for a quick listen, and sometimes for their quick remove-ability, compared to the Etys which, of course, cannot be offered to clients!
Bottom line Etymotic ER4S much cleaner and more natural, Beyer surprisingly good (or, at least, enjoyable) bass, convenient.