Pros: Bass detailing
Cons: Mids completely lack details, flat soundstage, harsh treble with a nasty metallic upper treble range
My rating may at first appear harsh but I just want to clarify up front that it is an absolute subjective rating not comparative.
I really thought these would blow me away given all I have read about these but once again Shure have failed to live up to the hype. I cannot argue that the price is very attractive given the build quality and fantastic comfort but that does not influence my feelings on the sound character of these.
In summary I found the following:
Highs - Nasty metallic 'piercing' sibilance with a lot of tracks not matter what was driving them (iBasso DX50, Xperia Z, FiiO E17, Denon MC6000 etc.) There is a good amount of detail but these were so fatiguing I could not listen for more than 20 - 30 minutes at a time.
Mids - Subdued and with certain tracks can completely disappear behind the highs/bass. Very disappointing. When the mids are there they lack deepth and width. Instruments fudge into one another instead of being nicely seperated.
Bass - For me this is the strongest point of the SE215s. Well extended but not 'mega bass' levels. Controlled, detailed and fade in and out nicely. Not too boomy. Very good overall.
I just want to reiterate my score is based on an absolute rating NOT when taking price into consideration. I personally do not like to include price into the equation as is muddys the results as prices of new/used earphones can vary so wildy.