20
INTERCONNECTION EXAMPLE
2-channel-mode: 2 x Mono Subwoofers bridged
FUNCTIONAL INSTRUCTIONS
INTERCONNECTION
• Connect the RCA lineouts of the head unit with the RCA jacks LINE IN of the amplifier with appropriate
high-value RCA cables. If a separate SUB OUT from your head unit is available, use this as LINE OUT.
• Connect the subwoofers with the SPEAKER O BRIDGED -.
• Always ensure that the total impedance load per channelpair is not lower than 4 ohms.
Too low impedance cause high temperature and will shut down the amplifier operation.
• Always ensure the correct polarity of the speakers. The interchange of plus and minus cause total loss of bass playback and could
damage the speakers.
CROSSOVER SETTINGS
• The X-OVER switch must be in position LP/BP, then the higher frequencies will be eliminated.
The cut-off frequency ist adjustable with the LP controller and should be set between 60 to 100 Hz, depending
on the size of the subwoofer.
• In lowpass mode (LP/BP) the HP controller works also as subsonic filter, that eliminates the ultra-low, not hearable and
harmful frequencies to generate a bandpass signal (Bandpass mode). The subsonic frequency should be set between
15 to 40 Hz, depending on the size of the subwoofer.
NOTE:
If this value is higher than the lowpass setting, no sound is hearable.
BASS BOOST CONTROLLER
• The BASS BOOST controller adjusts the bass enhancement between 0db and +12dB.
LEVEL CONTROLLER
• Turn the LEVEL controller of the amplifier to the MIN position.
• Turn the volume controller of the head unit to 80 - 90% of its full setting.
• Turn the LEVEL controller clockwise until you hear some distortion.
• Then turn back the LEVEL controller slightly until you hear a cleaner sound.
BASS REMOTE SUBWOOFER
• The enclosed Bass Level Controller adjusts the bass-level e.g. from the driver’s seat.
Please use only the enclosed bass remote controller and cable.
Use the bass boost with care.
A high bass boost level may cause damages to your speakers and hearing abilities.
NOTE
POWER INPUT
SPEAKER OUTPUT
LINE OUT
GND
+12V
REM
LINE IN
R
L
R
L
BRIDGED
R
L
VXi4002
LP
HP
BP
LEVEL
0dB
12dB
10Hz 1.2kHz
35Hz 250Hz
MIN MAX
BASS
BOOST
FULL
HP
LP/BP
X-OVER MODE
PROTECT
POWER
BASS LEVEL
CONTROLLER
FUSE
POWER INPUT
SPEAKER OUTPUT
LINE OUT
GND
+12V
REM
LINE IN
R
L
R
L
BRIDGED
R
L
VXi4002
LP
HP
BP
LEVEL
0dB
12dB
10Hz 1.2kHz
35Hz 250Hz
MIN MAX
BASS
BOOST
FULL
HP
LP/BP
X-OVER MODE
PROTECT
POWER
BASS LEVEL
CONTROLLER
FUSE
Connect stereo RCA output (L/R or SUB OUT)
of the head unit with LINE IN of the amplifier
LP/BP
Subwoofer
4 – 8 Ohms
Connect Bass Level Controller
with the enclosed cable
