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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 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 OUT.
Connect the subwoofers with the SPEAKER OUTPUTS + 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.
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/BP controller works also as subsonic lter, 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 +18dB.
LEVEL CONTROLLER
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
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
50A
POWER INPUT
FUSE
SPEAKER OUTPUT
BRIDGED
PROTECT
POWER
FULLHPLP/BP
LP HP/BP LEVEL
BASS LEVEL
CONTROLLER
AUTO TURN ON
(ONLY IN HI LEVEL INPUT MODE)
0dB 18dB
LINE IN LINE OUT
RL
LEVEL
INPUT
X-OVER
MODE
10Hz 1.2kHz30Hz 250Hz MIN MAX
OFF
ON
LOW
HI
BASS BOOST
ZRX4002
GND +12VREM
ZRX4002
L
R
L
R
BLUE / WHITE
LOG0
POWER INPUT
FUSE
SPEAKER OUTPUT
BRIDGED
PROTECT
POWER
FULLHPLP/BP
LP HP/BP LEVEL
BASS LEVEL
CONTROLLER
AUTO TURN ON
(ONLY IN HI LEVEL INPUT MODE)
0dB 18dB
LINE IN LINE OUT
RL
LEVEL
INPUT
X-OVER
MODE
10Hz 1.2kHz30Hz 250Hz MIN MAX
OFF
ON
LOW
HI
BASS BOOST
ZRX4002
GND +12VREM
ZRX4002
L
R
L
R
BLUE / WHITE
LOG0
Connect stereo RCA output (L/R or SUB OUT)
of the head unit with LINE IN of the amplier
LP/BP
Subwoofer
4 – 8 Ohms
Connect Bass Level Controller
with the enclosed cable
23


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