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 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.
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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.
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Replace the audio filters when they become dirty or clogged and the
sound of the Audéo PFE is affected.
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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.
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