Thanks for that really clear comparison, your reviews are superb individually but it's hard for me to stack them up given my lack of experience.
Now that I'm starting to narrow it down, how would you say the Soundmagic E10 fits in with the S4 and something a bit higher end like the Crystals?
The E10 is not quite as bass- and treble-heavy as the S4 but more so than the Crystals. It's actually a very solid earphone for the price. With the Crystals you'll get better detail and clarity, tighter bass, and of course better isolation.
hi ljokerl ! do you think that a 75 ohm resistor can improve the SQ of w4?
Didn't try to add resistance.