Fli Audio FL400.2-F1 User Manual
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FA1200.1
TERMINALS AND CONNECTIONS
1. Low level input
For connection to any source (headunit) with a low level output. This is your RCA output from the
source (headunit)
2. High level input
For connection to the speaker output of your source (head unit). This is to be used if the source
(head unit) does not have a low level output.
Note: Connect only to high level input or low level input
3. Gain control
This control is used to match the input signal of the source to the subwoofer amplifier channel.
See the setup section for more details.
4. Subsonic filter
This switch is used to set the subsonic filter which is used to limit the very low frequency
information passed to the subwoofer.This control is used to add bass boost to the amplifier
centred at 45Hz.
5. Crossover frequency control
This control is used to set the LPF crossover frequency for the subwoofer amplifier channel.
The frequency is adjustable between 50Hz and 500Hz.
6. Crossover mode select switch
This switch is used to select the crossover mode of the amplifier. FULL is full range output, LPF is
used to limit the amout of high frequency information passed to the speakers.
7. Bass boost select switch
This control is used to add bass boost to the amplifier centred at 45Hz.
0dB, +6dB, +12dB settings are selectable.
8. Phase switch
This switch alters the phase of the amplifier.
This is adjustable 0° or 180°, one setting will be more in time with the music produced by the
speakers in the vehicle.
9. Remote control input socket
Used to connect the supplied remote bass boost level control.
10. Power / protect LED
If the amplifier is operating normally the LED will illuminate blue.
If the amplifier is in protection mode the LED will illuminate red.
11. Power terminals
Used to connect DC power to the amplifier. See the power connection section for more details.
12. Fuse
Replace only with same value ATC fuse:
2 x 25 amps.
13. Speaker terminals
Used to connect the speaker wires to the amplifier. See the wiring configurations section for more
details.
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