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FUNCTIONAL INSTRUCTIONS
INTERCONNECTION EXAMPLE
2-channel-mode: 2 x Mono Subwoofers bridged
INTERCONNECTION
Connect the RCA lineouts of the head unit with the RCA jacks LINE IN CH 3 and CH 4 of the amplier with appropriate
high-value RCA cables. If a separate SUB OUT from your head unit is available, use this as line output.
Connect the subwoofers with the SPEAKER OUTPUTS CH1/2 + BRIDGED - and CH3/4 + 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 amplier 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.
INPUT MODE SWITCH
Select the 4CH position on the INPUT MODE switch.
CROSSOVER SETTINGS & BASS BOOST CONTROLLER
The X-OVER switch of CH1/2 must be in position DUPE an X-OVER switch of CH3/4 must be in position LP..
Note: All controllers (BASS BOOST, HP, LP) except LEVEL are without function. All settings will be synchronized with CH3/4.
The cut-off frequency ist adjustable with the LP controller of CH3/4 and should be set between 60 to 100 Hz, depending on the
size of the subwoofer.
The BASS BOOST of CH3/4 controller adjusts the bass enhancement between 0db and +12dB.
LEVEL CONTROLLER CH1/2 & CH3/4 (SUBWOOFER 1+2)
Turn the LEVEL controller of the amplier 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 1+2)
The enclosed BASS REMOTE CONTROLLER adjusts the bass-level e.g. from the drivers 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
PROTECT
POWER
FULLHP
LP
HP LEVEL
BASS LEVEL
CONTROLLER
0dB 12dB
LINE OUT
X-OVER
MODE
10Hz 1.2kHz30Hz 250Hz
CH3
CH4
MIN MAX
10Hz 1.2kHz MIN MAX
GND +12VREM
FULLHPDUPE
BASS BOOST
LINE IN
CH1
CH2
2CH4CH
INPUT MODE
BRIDGED
CH4CH3
LP
BRIDGED
CH2CH1
VXi6404
FUSE
4CH MONO MIX
X-OVER MODE
CH3/4
CH1/2
VXi6404
POWER INPUT SPEAKER OUTPUT
PROTECT
POWER
FULLHP
LP
HP LEVEL
BASS LEVEL
CONTROLLER
0dB 12dB
LINE OUT
X-OVER
MODE
10Hz 1.2kHz30Hz 250Hz
CH3
CH4
MIN MAX
10Hz 1.2kHz MIN MAX
GND +12VREM
FULLHPDUPE
BASS BOOST
LINE IN
CH1
CH2
2CH4CH
INPUT MODE
BRIDGED
CH4CH3
LP
BRIDGED
CH2CH1
VXi6404
FUSE
4CH MONO MIX
X-OVER MODE
CH3/4
CH1/2
VXi6404
Connect stereo RCA output (L/R or SUB OUT)
of the head unit with LINE IN (CH3 / CH4) of the
amplier
LP
DUPE
4CH
Subwoofer 1
4 – 8 Ohms
Subwoofer 2
4 – 8 Ohms
Connect Bass
Level Controller
with the enclosed
cable
23


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