How to wear the earphones
Check the L (left) and R (right) designations on each bush to distinguish between the right and left ear pieces (there are also protrusions at the bottom of the L on the left bush and on the reverse side of the same bush, so that left and right are easily distinguishable even in the dark). Holding the connector, fit the ear pieces into the ears using a slight twisting motion.
It is usual that a person's ears differ from left to right in terms of audio canal length and shape. Usually, fitting earphones in the same position in both left and right ears results in a discrepancy in the distance between the ear piece and the eardrum; this changes sound quality, and effects a slight sense of discomfort. With the F series, by changing sound quality through the positioning of the ear pieces in the ears, it is possible to avert this sense of discomfort between right and left. While playing music, move each ear piece around individually to find the fit that reproduces the most favorable sound for you. This is the best position for
the ear piece. At first, this may take time, but once you have set this position, your body will be quick to adjust and remember the audibility and the feel of the fit, and it will be easy to fit the ear phones into your ears following this.
You can also change the size of the ear pieces that you use; fit S or SS size ear pieces deep into the audio canals; insert L or LL size ear pieces just inside the ears; change the type of ear piece from silicon to foam and compare the two. Find the size and type of ear piece that delivers the best sound for you.