Focal FPX 4.800 Manuel D'utilisation page 13

FPX PREMIUM AMPLIFIER
U s e r m a n u a l
13
INPUT: These connectors are for low level signal inputs.
OUTPUT: These connectors (FPX 1.1000 and FPX 2.750) allow mirroring.
REMOTE: This connector (FPX 1.1000, FPX 2.750, FPX 5.1200) is for connecting the accessory volume control.
GAIN: The rotary GAIN control is for adjusting the level of the signal entering the amplifier. Voltage gain varies from
0.2 to 5V. Optimisation of the performance of the audio system consists of applying the maximum gain upstream in
the system and the lowest gain downstream.
This control should be adjusted to suit the level of the sound source (line output level).
Start by setting the amplifier gain at its lowest level. Gradually increase the level (volume) of the source up to 3/4.
Increase the gain on the amplifier up to the maximum desired listening level. Reduce the level if distortion occurs.
MODE: This switch (FPX 4.800, FPX 4.400 SQ, et FPX 5.1200) allows channels 3 and 4 (3, 4, 5, 6 for FPX 5.1200) to
mirror, if required, the signals from channels 1 and 2.
Thus, if you only have one stereo output (a right and a left), you can still amplify all four channels by activating 2CH
mode. If you wish to use FPX in its four independent channel mode, select 4CH.
FPX 5.1200 4CH mode allows channels 3 and 4 to mirror channels 5 and 6.
PHASE (°): The rotary PHASE control is used to adjust channel phasing with the rest of the system.
A readjustment of the phase of the subwoofer makes it possible for the subwoofer and the rest of the speakers to
play simultaneously at the crossover frequency. For a theoretical signal period, one of the sources is slightly shifted
so that at the listening position the phasing is perfect.
X-OVER MODE: This switch enables users to choose between a high-pass filter (HPF), a low-pass filter (LPF) or non
filtered mode (FULL).
X-OVER FREQ (Hz): Adjustment of the cross-over filter frequency. This rotary control adjusts the setting of the low-
pass or high-pass filter. The value selected defines the frequency up to which or from which the signal will be cut.
F-MULT: This switch activates a 10X multiplier for the setting value of the cut-off frequency.
SUBSONIC: This rotary control is used to remove sub-bass frequencies below a selected frequency.
BASS BOOST: This rotary control is used to raise the bass sound level from 0 to 12 dB.
FPX 4.800
fig.9