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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