Blaupunkt HEIDELBERG CD51 Operating Guide

22

Loudness means the bass and treble
are increased to a comfortable level at
lower volume levels.

➮

Press the AUD / LD 

=

 button for

approx two seconds.

When loudness is activated, LD lights
up on the display.

Setting the loudness intensity

The loudness level can be raised in
steps of one to six.

➮

Press the MENU button 

8

.

“MENU” appears on the display.

➮

Press the   button 

:

 repeatedly

until “LOUDNESS” appears on the
display.

➮

Press the   or   button 

:

 to set

the desired volume increase.

➮

Press the MENU button 

8

 or OK

;

 once you have completed the

setting.

This car radio is fitted with a parametric
digital equalizer. In this case, paramet-
ric means that for each of the five fil-
ters, one frequency can be individually
raised or lowered (GAIN +8 to - 8).

The following filters are available:

●

SUB LOW EQ

32 - 50 Hz

●

LOW EQ

63 - 250 Hz

●

MID EQ

315 - 1 250 Hz

●

MID/HIGH EQ

1 600 - 6 300 Hz

●

HIGH EQ

8 000 - 12 500 Hz

These filters can be set without meas-
uring equipment. This means that the
sound quality inside the vehicle can be
greatly influenced.

Notes on adjusting the equalizer

We recommend you use a CD you are
familiar with when adjusting the equal-
izer.

Before adjusting the equalizer, set the
tone and volume balance to zero and
deactivate the loudness function. To do
this, please see the chapter “Tone and
volume balance”.

➮

Listen to the CD you have chosen.

➮

Evaluate the tone impression ac-
cording to your taste.

➮

Now consult the chart “Sound im-
pression” section of “An aid to ad-
justing the equalizer”.

➮

Set the equalizer values as de-
scribed under “What to do”.