I wasn't expecting to write this but now I want everyone to know how much I enjoy them. I am very critical of high quality and Bass heavy music, and at first was ready to return them. Out of the box, the default setting is Bass but when i put them on and started playing my music, I was totally shocked at the 'tininess' of the sound. I was ready to return them, but decided to 'read the manual' (highly recommend you do that too). In my reading I came across a paragraph describing the ear buds and the 3 sizes they offer. Well, it comes out of the box with the smallest size. I started to read, and it says that 'if you want more bass, put on the next size larger'. I said to myself "no way" really???? So, rather than installling the medium sized buds, I decided to go 'all the way' to the largest. WOW !!!! IT WORKED !!! I now have 'clear' 'quality' and heavy bass headphones !!! One suggestion, provide a mini-clip that you can attach to the headphone base to your shirt so that it doesn't twist on your neck. Regardless, yo will not be disappointed !!!!