Summary: Bass is slightly boosted with a bit of extra warmth thrown in, but nowhere near the amount present in IE8.
Mids sound a bit aggresive with some 3.5k boost.
Highs are present, though not exactly delicate. Some 6k hump exists. Extension is ok, but the highest lack volume.
Pros: Excellent comfort, cable and build quality, good sound quality overall
Cons: Bass-slanted and warm sound, slight veil, over-the-ear only, too "fat" timbre, possible fit issues for people with small ears
Summary: Sennheiser has crafted a very successful line of in-ears with the IE-line. The IE7s are no exception, with an incredibly big sound stage and musical presentation they are a winner. My main beef with the IE7s is the sharp edge of the ear piece.
Pros: Midrange, Good amount of details, Pleasing sound signature, Musical presentation, Instrument separation, Sound stage!, Full bass with good precision and extension
Cons: Price, Will lack a bit of sparkle for some, Ergonomics for some