These earphones do not represent the same screaming bargain as the non customized Sleek-Audio SA6s for around $200, because they cost about $150 more and you do not have the option to tune the sound after you get them. The things you gain by going for the Sleek-Audio Customs rather than the SA6s is a better more airy sound with a bit better definition and heaps better wearing comfort. I think the Customs are a worthy upgrade over the normal SA6s because they are a little better in every aspect, plus the fact that they are custom fitted to your ears makes them more comfortable. The sound quality is stellar, especially the midrange and the highs are better than what you get from for example a pair of LiveWires. The LiveWires have one advantage though, and that is that they are $50 cheaper.

These custom in-ears are custom in every way I can think of, you get to choose the frequency response trim, the length of the canals, the colors, the graphics. That combined with an excellent build quality is a very nice combination. From a construction standpoint they resemble the LiveWires, but the finish is better with a smoother surface.

If you want a good set of custom in-ears and enjoy the clean, crisp, sound of the Sleek-Audio SA6s these are definitely the way to go, but if you are looking for the ultimate bass earphones you might want to have a look at some of the other more notorious bass earphones around. While the Sleek-Audio Customs have just enough bass for my liking it might not do the same trick for you. If the Sleeks had a gram more bass I would never have to take them off, I thoroughly enjoying listening to them.