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FUNCTIONAL INSTRUCTIONS
FEATURES AND OPERATIONAL CONTROLS
A 690 RXA
300 WATTS MAX.
FUSE
AUTO
TURN ON
INPUT
LEVEL
PHASE
SHIFT
PROTECT
POWER
MIN.
180°
LOW
HIGH
REM
DC OFFSET
AUTO
MAX.
50 Hz 150 Hz
BASS
BOOST
LOW
PASS
OUTPUT
LEVEL
REMOTE
0 dB 12 dB
POWER
INPUT
AUDIO
INPUT
2
1
4
3
5
The OUTPUT LEVEL controller allows you to adjust the volume to match the sound system with the head unit. Please avoid
any distortions while listening. If the enclosed bass remote (#8) is connected, the OUTPUT LEVEL controller is without function.
The LOW PASS controller (low pass lter) adjusts the cut-off point of the frequency range to above. The cut-off frequency is
continuously adjustable from 50 Hz to 150 Hz.
The PHASE SHIFT switch allows to switch the phase from 0° to 180°. Hence, you are able to adjust the subwoofer perfect to
the vehicle’s acustics.
The BASS BOOST controller allows to enhance the bass continuously from 0dB to +12dB at 45 Hz.
The INPUT LEVEL switch determines the type of input signal. If you want to operate the sound system with a linear preamplier
signal (low level), the switch must be in position LOW. If you want to operate the sound system with the speaker outputs of the
head unit (high level), the switch must be in position HIGH. Please refer to the instructions under #9.
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