Operation Manual

c. Audio filters

The audio filters have an essential acoustic function for the frequency

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

that matches what one perceives when listening with non-occluded

ears. Different kinds of audio filters are available for Audéo PFE: The grey

filter is for enhanced perception of the mid-frequencies, the black audio

filter for enhanced bass and treble and the green filters for Perfect Bass.

The green audio filter for Perfect Bass is mounted on the Audéo PFE 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 Audéo PFE. Audéo PFE 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 Audéo PFE 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.