Bridge Operation; Tri-Mode; Setting Into Operation; Switching On The Filter And Adjusting The Crossover Frequency - Monacor CARPOWER HPB-502 Notice D'utilisation

Connect the speakers to the terminals "speakers" (13)
GB
– also see fig. 3:
R- = negative pole right speaker
R+ = positive pole right speaker
L- = negative pole left speaker
L+ = positive pole left speaker

6.3.2 Bridge operation

In bridge operation the impedance of the connected
speaker or the total impedance of a speaker group
must not be lower than 4 Ω! Connect the speaker to
the terminals "speakers" (13), in which case the let-
tering "bridge mode" has to be observed – also see
fig. 4:
R- = negative pole
R+ = remains unconnected
L- = remains unconnected
L+ = positive pole

6.3.3 Tri-mode

A subwoofer in bridged mono operation and two mid-
high range speakers in 2-channel operation are driven
in the tri-mode. For this purpose a suitable tri-mode
crossover network is necessary. The impedance of the
connected speakers must not be lower than 4 Ω!
The tri-mode is possible for both models HPB-502
and HPB-1002. Due to the required power reserve this
kind of operation, however, is only recommended for
model HPB-1002.
Connect the speakers via a suitable tri-mode cross-
over network to the terminals "speakers" (13):
speakers
R L
bridge mode
10
right
in out
channel
L
left
in out
min. 4 Ω
channel
Tri-Mode
crossover
network
sub-
in out
woofer

7 Setting into Operation

!
Prior to the first switching-on, switch on the cor-
responding filter and coarsely adjust the cross-
over frequency (chapter 7.1) so that the speakers
are not overloaded by a frequency range that
might be too large. It is also recommended to
check the complete wiring of the car HiFi booster
once again for correctness. Only then connect the
negative terminal of the car battery again.
7.1 Switching-on the filter and adjusting the
crossover frequency
According to the speaker type used, switch on the re-
quired filter with the switch "selecter" (3):
For full range speakers set the switch to position
FLAT. Thus, all filters are switched off and the controls
"lowpass" (5) and "highpass" (6) have no function. The
booster reproduces the entire frequency range.
For mid-high range speakers set the switch to posi-
tion HIGHPASS. The high pass is switched on, and the
low frequencies are thus suppressed. First coarsely
adjust the crossover frequency with the control "high-
pass" (6)*. The control "lowpass" (5) has no function.
For bass speakers or a subwoofer set the switch to
position LOWPASS. The low pass is switched on, and
the medium as well as high frequencies are suppres-
sed. First coarsely adjust the crossover frequency with
the control "lowpass (5)*. The control "highpass" (6)
has no function.
* For a guidance observe the frequency range of the speak-
ers used. The fine adjustment is made with the correspond-
ing meters after the level adjustment.

7.2 Matching the level

R
min. 4 Ω
Note To keep the interfering radiation 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.
Subwoofer
min. 4 Ω
1) Turn the control "level" (4) to position "8v".
2) Switch on the car HiFi system completely. The red
LED "protection" (1) on the booster lights up for ap-
Tri-mode
prox. 3 seconds and then the green LED "power"
(2) lights up continuously. The signal is only switch-
ed to the outputs after 3 more seconds (switch-on
delay).
3) Adjust the signal source, e. g. the car radio, to the
maximal not distorting volume (in most cases ap-
prox.
4) Turn up the control "level" (4) so that just no distor-
tions occur.
5) If further boosters 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. (In case the total volume should not reach
the desired level, insert more powerful boosters
into the channels which are too poor.)
6) In case of model HPB-1002 the bass frequencies
can be boosted with the control "bass boost" (7).
3
/ of the maximum).
4