Monacor Carpower HPB-1502 Mounting Instructions Download Page 7

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Specifications

HPB-602

HPB-1502

Output power
Total power (P

max

)

2-channel operation with 2 Ω speakers
2-channel operation with 4 Ω speakers
Bridge operation with 4 Ω speakers

350 W
2 × 100 W RMS
2 × 70 W RMS
1 × 225 W RMS

750 W
2 × 250 W RMS
2 × 175 W RMS
1 × 500 W RMS

Frequency range

20 Hz – 20 kHz

Minimum speaker impedance
2-channel operation
Bridge operation

2 Ω
4 Ω

Inputs

0 .4 – 4 V/20 kΩ, RCA

Channel separation
S / N ratio
THD

> 45 dB
> 94 dB (weighted)
< 0 .2 %

> 50 dB
> 89 dB (weighted)
< 0 .2 %

Low pass
High pass
Bass boosting

40 – 300 Hz, 6 dB / octave
40 – 500 Hz, 6 dB / octave
0 – 12 dB / 50 Hz

Power supply

10 – 16 V (

⎓

), 22 A

10 – 16 V (

⎓

), 45 A

Admissible ambient temperature

0 – 40 °C

Dimensions (W × H × D), weight

252 × 62 × 243 mm, 1 .9 kg

252 × 62 × 363 mm, 3 kg

6.2.2 Bridge operation for a subwoofer

If a mono subwoofer is to be driven in bridge op-
eration, use one of the two following possibilities
of connection:
1 . If the car radio is equipped with outputs for a

subwoofer amplifier, connect them to the two
jacks INPUT (2) .

2 . For car radios without subwoofer output, con-

nect the line outputs for the left channel and
right channel separately to the two jacks INPUT,
as shown in fig . 3 .

6.3 Line outputs

If a second power amplifier is used in the car
HiFi system, the inputs of this amplifier can be
connected to the jacks OUTPUT (1) [see fig . 5]
to implement e . g . a 2-way active system with
mid-high range speakers and bass speakers or
a subwoofer . At these outputs, the same signal
is available which is fed to the jacks INPUT (2) .

6.4 Speakers

It is possible to use full range speakers (2-way or
3-way speakers), mid-high range speakers, bass
speakers, or a subwoofer . In 2-channel operation,
the power amplifier can drive the speakers for
the left channel and right channel or, in bridge
operation with increased output power, it can
drive the speaker for one channel or a subwoofer .

Important!

All speakers must be connected

with 2 poles, i . e . without common ground
connection . When choos ing suitable speakers,
pay attention to their mechanical and electrical
capability in con nection with the power used
of the power amplifier (also see specifications) .

6.4.1 2-channel operation

The highest output power is reached when con-
necting 2 Ω speakers or a speaker group with a
total impedance of 2 Ω per channel (e . g . two 4 Ω
speakers connected in parallel) . However, it is also
possible to connect individual 4 Ω speakers; in this
case, the output power is slightly reduced . Con-
nect the speakers to the terminals SPEAKER (15)
– also see fig . 3:
L+ = positive pole left speaker

L− = negative pole left speaker

R+ = positive pole right speaker

R− = negative pole right speaker

6.4.2 Bridge operation

In bridge operation, the impedance of the con-
nected speaker or the total impedance of a
speaker group must not fall below 4 Ω! Connect
the speaker to the terminals SPEAKER (15) . Pay
attention to the lettering BRIDGE – also see fig . 4:
L+ = positive pole

L− = remains unconnected

R+ = remains unconnected pole

R− = negative pole

7 Setting into Operation

Important!

Prior to the first switching-on,

select the filter with the switch CROSSOVER
(7) and coarsely adjust the crossover frequency
(chapter 7 .1) so that the speakers will not be
overloaded by a frequency range that might
be too wide . It is also recommended to check
first once again if the entire wiring of the car
HiFi power amplifier is correct, and only then to
connect the negative terminal of the car battery .

For most applications, the switch OUTPUT (8)
must be set to the position STEREO . Only if the
power amplifier is to drive two speakers for the

right channel or the left channel and only one
jack INPUT RIGHT or LEFT (2) is connected, set
the switch to MONO .

7.1 Selecting the filter and adjusting

the crossover frequency

Depending on the speaker type connected, select
the filter with the switch CROSSOVER (7) .
For

full range speakers,

set the switch to the

left stop to position FULL . The power amplifier
reproduces the entire frequency range .
For

bass speakers

or a

subwoofer,

set the switch

to position LP . The low pass is switched on and
the medium and high frequencies are suppressed .
For the time being, coarsely adjust the crossover
frequency with the control LP (6) .*
For

mid-high range speakers,

set the switch to

position HP . The high pass is switched on and the
low frequencies are thus suppressed . For the time
being, coarsely adjust the crossover frequency
with the control HP (5) .*

* For a guidance, observe the frequency range of the

speakers used . The fine adjustment is made with cor-
responding meters after the level adjustment .

7.2 Adjusting the level and

the bass boosting

Hint

To keep the interference by the electric

system of the car as low as possible, the output
level of the signal source should be 1 .5 V as a
minimum .

1) Turn the control LEVEL (3) to the left stop to

position MIN .

2) Switch on the car HiFi system completely . The

green POWER LED (13) lights up . However, the
power amplifier is muted for approx . 3 seconds
(switch-on delay) .

3) Adjust the signal source, e . g . the car radio, to

the maximum, non-distorting volume .

4) Turn up the control LEVEL (3) to the non-

distorting maximum .

5) If required, the bass frequencies can be

boosted with the control BASS EQ (4) [max .
12 dB / 50 Hz] .

6) If further power amplifiers are used in the car

HiFi system, reduce the levels of the channels
which are too high to match the volumes of
all channels with each other .

8 Troubleshooting

If there is no sound after switching on the car HiFi
system, locate the fault more precisely by means
of the two LEDs POWER (13) and PROT . (14) .

The LED POWER does not light up

1) Check the fuses (12) of the car HiFi power

amplifier HPB-602:

HPB-602: 1 × 30 A

HPB-1502: 2 × 30 A

and the additional fuse at the car battery

HPB-602: 30 A

HPB-1502: 60 A

Replace defective fuses . Only use fuses with
the indicated values . Never insert a fuse of a
higher value . The power amplifier may be dam-
aged and the warranty will be void .

2) Check the 12 V power supply cable and the

ground cable for correct connection and for
interruptions .

3) Check at the terminal REM (10) of the power

amplifier if +12 V is available . If not, remove
the cable at the terminal REM and temporarily
bridge the terminals REM and “+12V” (11) . If
the power amplifier switches on now, the fault
is due to the missing control voltage . Check the
12 V control output of the car radio and the
corresponding connection cable to the power
amplifier .

The LED POWER lights up

1) Check the cables with RCA connectors from

the signal source to the car HiFi power ampli-
fier . Are the plugs correctly connected? Are the
cables interrupted?

2) Check the signal source . Is the signal source

switched on? Have the correct outputs been
used? Is the signal source defective?

3) Check the speaker cables for interruptions .
4) Check the connected speakers .

LED PROT. lights up

The power amplifier is protected with a protective
circuit against short circuit at the speaker outputs
and against overheating . If the protective circuit
is activated, the LED PROT . (14) lights up . In case
of overheating, the power amplifier automatically
switches on again after cooling down . In case of
a short circuit at the speaker outputs, after elim-
inating the error, the 12 V control voltage must
shortly be switched off (e . g . switch off the car
radio) to reset the protective circuit .

Subject to technical modification .

INTERNATIONAL GmbH & Co. KG. No part of this instruction manual may

be reproduced in any form or by any means for any commercial use.