13
Initial start-up and functions
1
Line Input
2-channel lowlevel line input to connect signal
sourc es such as head units / radios / DSPs.
Important:
It is strictly forbidden to use the
High-
level Input
and lowlevel
Line Input
at the same time.
This may cause severe damage to the lowlevel line
outputs of your head unit / car radio.
2
Highlevel Input
2-channel highlevel loudspeaker input to connect
the amplifier directly to the loudspeaker outputs of
OEM / aftermarket radios that do not have any low-
level line outputs.
The
Highlevel Input
is equipped with our proprietary
ADEP circuit (Advanced Diagnostics Error Protec-
tion) which ensures that the car radio detects the
amplifier as a speaker and thus neither any function
of the radio (e.g. fader) will be deactivated nor any
error log in the CPU of the car will be created.
If this input is used the remote input (
REM
) does
not need to be connected as the amplifier will
automatically turn on once a loudspeaker signal is
applied.
Attention:
Solely use the pluggable screw-terminal
for the highlevel connector which is included in de-
livery!
Important:
It is strictly forbidden to use the
High-
level Input
and lowlevel
Line Input
at the same time.
This may cause severe damage to the lowlevel line
outputs of your car radio.
3
Level Input
This control is used to adapt the input sensitivity to
the output voltage of the connected signal source.
This is not a volume control, it´s only for adjusting
the amplifier gain. The control range of the RCA /
Line Input
(lowlevel) is 0.5 - 6 Volts and 1 - 14 Volts
for the
Highlevel Input
.
If the
Highlevel Input
is used in combination with a
standard car radio we recommend an input sensitiv-
ity of roughly 9 Volts. For this purpose, turn the
control from max. CCW position to 9 o’clock posi-
tion.
4
Phase Shift
This control is used to adjust the phase from 0° to
180°. This allows to match the phase of the sub-
woofer with the other speakers thus avoiding any
cancellations in the frequency response due to
phase shifts.
5
Bass Boost
This control is used to increase the bass response
at a center frequency of 45 Hz from 0 to 12 dB.
6
Subsonic
This control is used to adjust the crossover frequen-
cy of the subsonic filter from 10 Hz to 50 Hz. The
subsonic filter cuts off very low frequencies which
aren’t audible and therefore relieves the amplifier
and also the subwoofer. Additionally the amplifier
will have more power available for the audible fre-
quencies. This control is always activated and its
adjustment is mandatory.
7
Remote
This input is used to connect the included remote
control. The remote control allows you to control the
volume of the amplifier.
