Operation Manual

c. Audio filters

The audio filters have an essential acoustic function for the frequency

response of the earphones. The purpose of this filter is to deliver sound

that matches what one perceives when listening with non-occluded

ears. The product comes with two different types of audio filters:

The grey filter is for enhanced perception of the mid-frequencies, and

the black audio filter for enhanced perception of bass and treble. The

grey audio filter is mounted on the earphones by default. Because each

individual's perception of sound is unique, Audéo PFE allows you to

choose the filter that suits your personal preferences. Another function

of the audio filter is to prevent dirt from entering the sound tube.

Make sure that the audio filters are in place before using the

earphones. The earphones only function correctly if the audio

filters are inserted in the output tube.

Replace the audio filters when they become dirty or clogged and

the sound of the earphones is affected.

Always use audio filters having the same color for both the right

and left earphone.

To replace the audio filters proceed as follows:

1. To change the ear tips (foam or

silicone), grab the ear tip in the

middle and pull it slowly until it

comes loose.

2. Gently push and twist the

"threaded end" of the changing

tool into the used audio filter.