Loved the sound of the 750's (favourite earbuds to date), but had to return them because of cable problem. I was going to ask for a replacement, but was intrigued by these t10i's. They arrived today and compared to the 750's in my honest opinion they are a huge step back. Firstly just the weight of them is a problem, using the same tips I used with the 750's (stock double flange) they were slipping out my ears. Secondly I don't know what it was, but I had small bits of black residue on the top of the metal casing, and a slight dent. Thirdly the sound, only one way to put this "too much bass!". The 750's sound signature was perfect, these t10i's sound so muffled, it's ridiculous, it sounds like i've gone from an audiophile grade headphone to beats... I tried to see if the treble filter would improve the situation, the high's were much more prominent, but the mids were still masked and lots of sibilance was introduced. Definitely returning these and getting another pair of 750's, really had high hopes for these t10's. oh well...