Viking TMC 148 ユーザーズマニュアル

27

The acoustic characteristics of the car in-
terior affect the quality of the sound repro-
duced in your vehicle to a much greater ex-
tent than the speakers.

Position, installation and the rear volumes
of, for example, the door or rear window
shelf all play an important role.

Even the sound produced by well selected
and installed speakers can be affected ne-
gatively by resonance frequencies in the
vehicle interior.

As a result, the bass sounds may be lost or
reverberate, the mid-range tones sound too
overpowering and music instruments or
voices may be distorted or the total sound
quality may be completely lifeless.

The overall sound quality can be greatly
enhanced if certain frequencies are suppres-
sed or boosted.

This car radio has been equipped with a
parametric filter. The “LOW EQ” filter  can
be set from 32 to 500 Hz. In this context,
parametric means that it is possible to set
the frequency for the filter and either boost
or reduce it (+10 to -20 dB) individually.

This parametric filter can be adjusted to very
exact settings even without the help of
measuring instruments.

The individual steps required to make the-
se settings are described in the table.

The following notes are intended as recom-
mendations only. They do not necessarily
reflect your own personal sound prefe-
rences.

We recommend that you use a music CD
you are familiar with to make the settings.
The CD should include tracks with different
instruments and vocals. Purely electronic
music is not well suited to serve as a basis
for making the settings because the original
sounds cannot be determined.

Before you set the equaliser, set bass, treb-
le, balance and fader to “0”.

This setting is described in the Quick Refe-
rence under 

A

 AUD.

Now listen to the CD you have selected.

Evaluate the sound according to your own
personal preferences.

Now refer to “Sound impression/problem” in
the table and you will find suggestions to
eliminate any problems under “What to do”.

Make the settings for bass and the lower
mid-range tones with the LOW EQ filter.

The “LOW EQ” filters can be set in the DSC
menu:
•

Press DSC.

•

Press  /  as often as necessary until
“LOW EQ” appears in the display.

•

Press << or >> once and

•

Set the level in the following table by
pressing  / .

•

Press << >> to switch the frequency
range.

•

Press 

 to store your settings.

You can switch the equaliser on and off by
pressing AUD for approx. 2 seconds.

Now you can compare the sound produced
by your car radio with and without the equa-
liser.