Operating Elements And Connections; Safety Notes - Monacor HPB-240/SW Montageanleitung

Please unfold page 3. Then you can always see the
operating elements and connections described.

1 Operating Elements and Connections

1 Bass/treble controls
2 Selector switch for subwoofer operation with cross-
over frequency 80/120 Hz to be selected
3 Control for level matching
4 Line inputs
5 Fuse,
HPB-240/.. : 20 A
HPB-260/.. : 25 A
6 Ground terminal
7 +12 V supply voltage
8 Control input +12 V for switching on of the booster
9 LED display,
green: operation
red: the protection circuit has switched off the
booster
10 Speaker connections

2 Safety Notes

•
While connecting the booster to the car battery, be
especially careful. In case of short-circuits there
may be very dangerously high currents. Therefore
prior to the connection screw off the positive termi-
nal of the car battery.
•
The booster must be mounted at a mechanically
rugged place in the car in a fixed and skilful manner,
so that it does not become loose and a dangerous
projectile.
•
While in operation the booster can get very hot.
Therefore do not place any objects near it which are
sensitive to heat and do not touch it while in opera-
tion.
•
If the booster is used for purposes other than orig-
inally intended, if it is operated, connected, or repair-
ed in the wrong way, no liability can be taken over for
possible damage.
•
For cleaning only use a dry cloth for dust removal,
by no means chemicals or water.
3 Caution in Case of High Volumes
•
Never adjust the volume very high. Extremely high
volumes may damage the hearing.
•
A person's hearing gets accustomed to high
volumes which after some time do not seem to be so
high. Therefore do not increase a high volume even
further after getting used to it.
•
While driving in a car the volume of the car audio
system must not be adjusted so high that the signal
sirens e. g. of an ambulance car cannot be heard
any more.
4 Mounting
While choosing the mounting place, watch the follow-
ing items:
•
The power supply cable from the battery to the
booster should be as short as possible. It is better to
use longer speaker cables and shorter power supply
cables.
•
As the booster becomes very hot while in operation,
a sufficient ventilation must be provided.
•
As forces may occur while braking, the booster must
be screwed at a mechanically rugged place.
•
The fuses and controls must be accessible.
For mounting use the four drill holes in the heat sink.
Firmly mount the booster at a suitable place with
4 screws.
5 Connections
To prevent short-circuits, prior to the connection of
the booster screw off the positive terminal of the car
battery.
The complete construction is shown in fig. 3 (two
speakers are used). Fig. 4 shows the connection of
one speaker in bridge operation.
5.1 Power Supply
5.1.1 Terminal RMT (8)
The booster is switched on and off by a +12 V control
votage at the terminal RMT. Connect the terminal RMT
with the +12 V output of the radio (connection for a
motor antenna, if necessary to be connected in paral-
lel with the motor antenna).
If there is no +12 V output at the car radio, the ter-
minal RMT must get +12 V for switching on via the
ignition key lock or a separate switch.
5.1.2 Terminal +12 V (7)
Connect the terminal +12 V via a cable of correspond-
ing cross section (see next para. 5.1.3) with the posi-
tive terminal of the car battery. To prevent a short-cir-
cuit by the newly laid +12 V cable, an additional fuse
must be inserted very close to the battery (fig. 3). Size
of the fuse:
HPB-240 /.. : 20 A
HPB-260 /.. : 25 A.
5.1.3 Cross sections of the power supply cables
Important! For the cross sections the total cable
length of the +12 V power supply cable plus ground
cable is decisive!
Recommended cable cross section*
Total cable length HPB-240/..
max. 14 A
2 m 2 mm
4 m 4 mm
6 m 6 mm
10 m 10 mm
*With the recommended cable cross sections there is
a max. voltage drop of 0.25 V in the power supply
cables. If minor cross sections are used, the voltage
HPB-260/..
max. 25 A
2 2
4 mm
2 2
7 mm
2 2
10 mm
2 2
20 mm
GB
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