  Sony XBA-4SL   Pros: Sound stage, Separation, details, bass
and price  Cons: Sibilant, thin wires   Samsung Galaxy S2
(International), IPhone 3GS, IPad 2, Macbook Pro > Creativ e
Sound Blaster Digital Music Premium HD   Highs: Bright and
detailed highs. Decay at a much later stage, and because of
that, you can hear much more, e.g. like the end vibration of
cymbals. But also because of this, there's some sibilant due to
the extension of the highs compared to UM3X. Different tips help
though.   Mids: Westone UM3X is definitely better here. Mids are
pretty recessed for these. So this might affect some vocals,
especially with the stronger bass, which might drown out the
vocals a little.   Lows: This 2 earphones are different
beasts.UM3X has got lighter but more impact-ful bass. Some
people find it a little lacking, but I kinda like the balance
here.   XBA-4SL has got more (read: not stronger) bass and more
presence. Bass seems to appear more often, i suspect it is due
to the inclusion of the sub driver. A good