Sony xb30ex are younger siblings of sony xb400(an on-ear xtra bass series product).
The shape of the cable is a big plus.quality not compromised and also looks cool.cable has neither sticky feel nor attracts dirt.plug is at right angle and is gold plated.the ends of the cable are well soldered with the jack on one end and with ear-piece on other end.
The design of the ear piece looks like custom molded earphones(which recording artists and musicians use) so it should generally fit everyone(there may be exceptions) and really goes deep inside the ears.
The isolation it provides from outer environment is praiseworthy.you will get to know its level of isolation in trains and buses(caution don’t walk around with these in ur ears on road.u will not hear horns). Now coming to what its made for-BASS!.yess this is strictly for bassheads.
The lows overpowers the highs.the mids are better than the highs. The soundstage is wide enough.( to get an idea about highs, mids, lows do a bit of googling.these determine your heasdphones taste on ur ears).Go for this If you love bass.I bought this from flipkart for only 499 in an offer.