25
ENGLISH
POWER/PROTECT
If the LED lights up in green, the amplifier is ready for operation. If the LED lights up in red, there is a
malfunction. Refer in this case to chapter
TROUBLE SHOOTING
on page 28.
17
LOW PASS
This controller limits the frequency at REAR upwards. The crossover frequency is adjustable from 50
Hz to 5000 Hz (5 kHz).
16
AUTO TURN-ON
If your head unit does not have a turn-on signal (REM), you can use the automatic turn-on function of
the amplifier. This works in two ways, which can be set at the AUTO TURN-ON switch:
DC
: This method only works if you use the amplifier’s
HIGH LEVEL INPUT
. The amplifier then detects
a voltage rise to 6 volts when the head unit is turned on by a so-called “DC offset” and then turns on
the amplifier.
VOX
: Select this method when using the
LINE INPUT
RCA jacks. The amplifier then detects a voltage
increase in the incoming audio signal when switching on the head unit via the attached RCA cable and
then switches on the amplifier.
Note:
As soon as the head unit is switched off again, the amplifier switches itself off.
The terminal for the amplifier turn-on can now be used to supply additional amplifiers with a turn-on
signal. Simply connect the REM terminals of the two amplifiers and make sure that the other amplifier
is in “normal” turn-on mode, which means that the
AUTO TURN ON
function is disabled.
15
BASS BOOST
This controller adjusts the bass boost from 0 dB to +12 dB at 45 Hz on channel pair REAR. In DUPE
mode the bass boost is also effective on FRONT.
18
HIGH PASS
This controller limits the frequency at the respective channel pair FRONT or REAR downwards. Low
frequencies that can damage a loudspeaker are cut off. The crossover frequency is adjustable at
FRONT from 50 Hz to 5000 Hz (5 kHz) and at REAR from 10 Hz to 500 Hz.
14
REAR X-OVER MODE
This switch selects the desired operating mode of channel pair REAR:
FULL:
Full Range mode - the entire frequency range is amplified.
HP:
High Pass mode adjustable with HIGH PASS - frequency is limited downwards.
LP/BP:
Low Pass mode adjustable with LOW PASS - frequency is limited upwards.
The HIGH PASS controller acts as a Bandpass filter and limits the frequency downwards.
Note:
If the HIGH PASS controller is set higher than the LOW PASS controller, no sound is heard.
13
BLC REMOTE
The BLC REMOTE port is for connecting the cable of the included bass level remote controller. With
this, the bass level can be e.g. be adjusted from the driver’s seat. Only use the supplied bass remote
controller and the associated cable. The bass level remote controller only works in LP/BP mode (Low-
Pass/Bandpass) on channel pair REAR, in DUPE mode also on channel pair FRONT.
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