Caution In Case Of High Volumes; Applications; Mounting; Connecting The Booster - Monacor CARPOWER HPB-502 Notice D'utilisation

3 Caution in Case of High Volumes

Never adjust the volume very high. Extremely high
volumes may damage the hearing.
The human ear gets accustomed to high volumes
which do not seem to be so high any more after
some time. Therefore, do not increase a high volume
which has once been adjusted after getting used to it.
While driving in the car, signal sounds, e. g. by an
ambulance, must not be drowned by the volume of
the car HiFi system adjusted too high.

4 Applications

The boosters HPB-502 and HPB-1002 are especially
designed for car HiFi systems and can drive two full
range speakers. Due to the integrated crossover net-
works it is also possible to realize with an additional
booster a 2-way active system with two mid-high
range speakers and two bass speakers or a sub-
woofer. To achieve higher output power, the booster
can drive a speaker in bridge operation.

5 Mounting

When choosing the place of mounting, observe the fol-
lowing items in any case:
The 12 V power supply cable from the battery to the
car HiFi booster should be as short as possible. It is
more advantageous to use longer speaker cables
and a shorter power supply cable instead.
The ground cable from the booster to the chassis of
the car should also be as short as possible.
For carrying off the heat being generated in the car
HiFi booster, a sufficient ventilation has to be en-
sured.
As forces occur during braking, the booster must be
screwed to a mechanically stable place.
The fuse and the controls must be accessible.
For mounting use the four drill holes at the heat sink.
Firmly mount the car HiFi booster to a suitable place
with four screws.

6 Connecting the Booster

The connection of the car HiFi booster to the electric
system of the car must only be carried out by author-
ized personnel.
To prevent damage in case of a possible short circuit
during installation, prior to connection it is essential
to screw off the negative terminal of the car battery.
Lay the necessary cables so that their insulation
cannot be damaged.
The complete connection is shown in fig. 3 or fig. 4.

6.1 Power supply

6.1.1 Terminal "+12v" (10)

Connect the terminal "+12v" via a cable with a cross
section of min. 10 mm 2
POWER) to the positive terminal of the car battery. To
protect the newly laid 12 V cable against short circuit,
(e. g. CPC-100/RT by CAR-
insert in any case an additional fuse (15 A for HPB-502
or 25 A for HPB-1002) very close to the battery (fig. 3).
To stabilize the operating voltage for the booster
and the resulting power increase as well as sound im-
provement, a power capacitor is recommended (e. g.
CPS-500 or CPS-1000 by CARPOWER).

6.1.2 Terminal "ground" (12)

Connect the terminal "ground" via a cable of a cross
section of min. 10 mm 2
POWER) to the ground of the car or directly to the
negative terminal of the car battery. To avoid ground
loops, the ground of the car radio must be placed at
the point where also the booster is grounded.

6.1.3 Terminal "rem" (11)

The car HiFi booster is switched on and off by a +12 V
control voltage at the terminal "rem". Connect the ter-
minal "rem" to the 12 V output of the car radio (connec-
tion for a motor antenna, if necessary to be connected
in parallel with the motor antenna).
If no 12 V output is provided at the car radio, the
terminal "rem" must get +12 V via the ignition lock or a
separate switch.

6.2 Inputs

Connect both inputs "line in" (8) via cables with phono
connectors to the corresponding line outputs of the
car radio (fig. 3). If no line outputs are provided on the
car radio, alternatively connect the speaker outputs of
the car radio via a corresponding transformer (e. g.
FGA-20 by CARPOWER) to the booster inputs.
If the booster in bridge operation is to drive a
speaker for the right or left channel, connect both
inputs "line in" in common via a Y cable (e. g. CBA-
25/SW by CARPOWER) to the line output of the right
or left channel at the car radio – also see fig. 4. (How-
ever, if a mono subwoofer is driven in bridge operation,
connect the inputs separately, as shown in fig. 3.)

6.3 Speakers

It is possible to use full range speakers, mid-high
range speakers, or bass speakers or a subwoofer. In
2-channel operation the booster can drive the speak-
ers for the left and right channels or in bridge operation
with increased output power it can drive the speaker
for a channel or a subwoofer.
Important! All speakers must be connected with
2 poles, i. e. without common ground
connection.
When choosing suitable speakers, pay in
any case attention to their mechanical
and electrical capability in connection
with the booster power applied (also see
specifications of the booster page 11).

6.3.1 2-channel operation

The greatest output power is reached when connect-
ing 2 Ω speakers or a speaker group with a total impe-
dance of 2 Ω per channel (e. g. two 4 Ω speakers or
four 8 Ω speakers connected in parallel). However, it is
also possible to connect individual 4 Ω or 8 Ω speakers
in which case the output power is reduced.
(e. g. CPC-100/SW by CAR-
GB
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