Setting The Equalizer; Notes On Making The Settings - Bosch Blaupunkt Davos RDM 169 Operating Instructions Manual

Setting the equalizer

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 the resonance in the vehicle in-
terior.
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 audio system is equipped with one
(Davos RDM 169) or two (Hannover 2000
CD / St. Moritz RDM 169) parametric filters.
The first filter "LOW EQ" can be set from 32
to 500 Hz, the second filter "HIGH EQ" from
630 to 10,000 Hz. In this context, parame-
tric means that it is possible to set the fre-
quency and either boost or reduce it (+10 to
–20 dB) individually for each of these filters.
These parametric filters can be adjusted to
very exact settings even without the help of
measuring instruments.
The individual steps you have to take to
make these settings are described in the
following table.

Notes on making the settings

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 equalizer, set bass, treb-
le, balance and fader to "0" and switch the
Loudness function off, if necessary.
This setting is described in the Quick Refe-
rence under 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,
select HIGH EQ for treble and mid-range
tones (Hannover 2000 CD / St. Moritz RDM
169).
The "HIGH EQ" and "LOW EQ" filters can
be set in the "DSC" menu:
• Press "DSC". Press / as often as
necessary until "HIGH EQ" or "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 "DSC" to store your settings.
You can switch the equalizer on and off in
the "DSC" menu using the "EQ ON" or "EQ
OFF" option.
Now you can compare the sound produced
by your car stereo with or without the equa-
lizer.
/ .
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