7
LOW-LEVEL OPERATION OF THE ACTIVE SUBWOOFER (FIGURE 3)
The LOW LEVEL INPUT (10) of the active subwoofer is used here. The REMOTE cable is connected
as described in the chapter „CONNECTING TO THE POWER SUPPLY“. The LINE output or low-level
subwoofer output of the car radio is connected to the LOW LEVEL INPUT (10) of the active subwoofer
using an RCA cable. The switch (3) is set to „OFF“. The high-level input (9) is not used.
HIGH-LEVEL OPERATION OF THE ACTIVE SUBWOOFER (FIGURE 2)
The stereo high-level input (9) of the active subwoofer and the supplied adapter (15) are used
here. Please observe the correct polarity! The active subwoofer is connected to the loudspeaker
outputs of the car radio. The automatic switch-on mechanism of the high-level input is used here to
automatically switch on the subwoofer. The switch (3) must be set to „ON“ to enable this; the REM
input (12) is not connected. The low-level inputs (10) are not used.
The red wire “ACC 12V B+“ of the adapter is connected to the vehicle’s ignition voltage and the black
“GROUND“ wire to the vehicle chassis or the negative terminal of the battery.
Important
: High AND low-level operation cannot be used simultaneously!
CABLE CONNECTIONS / HIGH LEVEL CONNECTION
a) White cable:
Loudspeaker connection LEFT +
b) White/black cable: Loudspeaker connection LEFT -
c) Grey cable:
Loudspeaker connection RIGHT +
d) Grey/black cable: Loudspeaker connection RIGHT -
e) Red cable:
12V battery positive terminal (ACC 12V B+)
f) Black cable:
Earth (ground)
SETTING THE INPUT RESPONSE
The input response can be adjusted to any car radio. Turn the volume control of your radio to the
medium setting and then set the input level control (7) (remote control or INPUT GAIN on the unit)
in such a way as to produce a medium, average volume. This setting normally ensures sufficient
power reserves at an optimum noise voltage interval.
Warning:
Reproduce loud test signals for a short time only so as to avoid damage to the speakers.
LOW-PASS FILTER LOW-PASS
Set the desired transfer frequency on the low-pass filter control (LOW-PASS
(5)
). The filter should be
adjusted to the sound requirements inside the audio system. The filter’s edge steepness ensures
the precise lowering of medium and high-frequency ranges.
BASS-BOOST
The bass-boost function (6) is used to increase or equalize the lower bass frequencies.
VOLUME REMOTE CONTROL
The volume can also be controlled using the remote control (16) provided.
The remote control unit should be mounted on the dashboard or at any other easily accessible
position. The subwoofer volume can now be adjusted independently of the settings on the car radio.
PHASE SWITCH PHASE
In normal use the phase switch
(4)
should be set to 0°. However, in rare cases it may be advantageous
to set the phase to 180° (e.g. if the subwoofer is far away from the front loudspeakers). Generally
speaking: the setting where the lower base tone area has a fuller sound is the correct one.
