Focal PERFORMANCE DIRECT FET Manuel D'utilisation page 19

FOCAL DIRECT FET
U s e r m a n u a l
1°/ INPUT(S): The RCA plugs are dedicated to the low level signal input.
2°/ GAIN: The rotary GAIN control potentiometer allows you to adjust the incoming signal to the amplifier.
CAUTION: increasing the input gain does not mean more power, but more noise. The voltage gain va-
ries between 0.2V and 5V. Optimisation of the sound system consists in applying the maximum
gain as soon as possible beforehand on the sound system and then the minimum gain afterwards.
This potentiometer must be set according to the source volume (line output level). Start by setting the amplifier
gain to its lowest level. Gradually turn up the level of the source volume up to the 3/4 of the way. Turn up the
amplifier gain level to the desired maximum listening level. Turn down the level if distortion occurs.
3°/ +12V: the power connector "+BATT" is dedicated to receive the power cable connecting the amplifier to the
positive (+) terminal of the battery.
4°/ GND: the GND (ground) power connector is dedicated to receive the negative (-) power cable connecting the
amplifier to the chassis of the vehicle.
5°/ REM : the REM connector connects the amplifier to the source (head unit via a REM or REMOTE output on the
head unit. This enables the automatic turn-on of the amplifier as soon as the source (head unit) is turned on.
6°/ SPEAKERS : the SPEAKERS connectors link the amplifier to the speaker drivers. The polarities MUST be respec-
ted (+ amplifier + crossover or + speaker driver / - amplifier - crossover or - speaker driver).
7°/ FUSES: The FUSE connector is dedicated to receive the amplifier fuse(s). In case of replacement, make sure
that the ampere rating is correct.
8°/ LEDs: the indicator LEDs enable you to check the amplifier is working correctly. A continuously illuminated
green LED means the equipment is working correctly. A continuously illuminated red LED means the equip-
ment is not working correctly. See troubleshooting section page 6.
9°/ HI LEVEL INPUT(S) : This connector is dedicated to high-level inputs (wiring on the amplified outputs of a head
unit without RCA outputs).
10°/ Crossover selector: the CROSSOVER switch enables you to choose to activate a high-pass filter (HPF), a low-
pass filter (LPF) or full range mode (FULL).
11°/ Setting the crossover cut-off frequency: This rotary potentiometer enables you to adjust the value of the high-
pass or low-pass filter. The selected value determines the frequency up to which or from which the signal will
be cut off.
12°/ Bass boost : the switch or rotary potentiometer (FD1.350 or FD2.350 respectively) enables you to increase the
volume of the bass from 0 to 12dB.
13°/ Phase : the PHASE rotary potentiometer enables you to adjust the channel phase setting according to the rest
of the installation. Adjusting the phase of the subwoofer enables the speaker driver output to be in phase or out
of phase with the other speaker drivers. On a theoretical period of a signal, one of the sources can be adjusted
slightly for the phase to be perfectly balanced at the listening point.
14°/ Mode selector: The INPUT SELECT switch (only available on the FD4.350 model) enables channels 1 and 2 to
be played through channels 3 and 4. So, if you only have one output (one right and one left), you can still amplify
the four channels by activating the 1/2 mode.
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PERFORMANCE
®
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