BEST ANSWER:

As an audiophile who is very perceptive of tones and frequencies as well intolerant to distortion and sounds that are not reproduced accurately, I noticed no difference from the first play out of the box to subsequent plays using these earbuds. That said there are the 3 options you must listen to to choose which ones sound the best to you. Also the various plugs that fit in your ear will make a difference to the sound quality. As with all earbuds, if they are not seated properly in the ear canal, the bass tends to disappear and other tones are weak as well. Break in periods for electronics tends to be a myth or at least unprovable. In my experience I have only noticed a few components seem to get better over time. But I have noticed that my perceptions of some have changed the more I listen and comprehend more of what I am actually hearing. Mostly time reveals to me the flaws in the component not usually a change in the sound. Of course if you attempt to burn them in, you will never know if it really made any difference or not as you won’t have a comparison to judge. So I say just use them to listen to music instead of sending any kind of signal tone through them and then judge for yourself if they sound different from the first play to additional plays. It won’t make any difference whether it is a single tone or the varied frequencies of songs to the “Break-in” process. In fact it would likely be better that way if the process is truly real as speakers are dynamic not static when it comes to tones.