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Connections and functions specific to the FP 1.800 amplifier
ቯ REMOTE CONTROL:
NOTE: DO NOT CONFUSE REMOTE AND REMOTE CONTROL. The REMOTE CONTROL output is for
connecting the supplied remote control unit. This accessory enables your to remotely adjust the amplifier’s gain.
NOTE: the REMOTE CONTROL (remote control) of the FP 5.500 amplifier ONLY works on the SUB output
(subwoofer).
ተ PHASE: the PHASE potentiometer allows you to adjust the channel phase according to the installation.
NOTE: the PHASE control of the FP 5.500 amplifier is ONLY active on the SUB output (subwoofer).
ቱ SUBSONIC: the SUBSONIC potentiometer is ONLY the equivalent of a HI PASS filter for the subwoofer
output of the amplifier (SPEAKER output for the FP 1.800 amplifiers, SPEAKERS Sub+ Sub- output for the
FP 5.500 amplifier). The selected value defines the frequency from which the signal will be amplified.
Activation of the filter can avoid distortion.
NOTE: the SUBSONIC filter of the FP 5.500 amplifier is actually an ON/OFF button. The cut-off frequency
is 25Hz with a 24dB/octave roll-off.
ቲ BASS BOOST 0/12dB: the BASS BOOT 0/12dB potentiometer enables you to raise the level from 0 to
12dB over a frequency range which must be selected through the BASS BOOT 20/80Hz potentiometer
(frequency selection ONLY available on the FP 1.800 amplifier).
NOTE: the BASS BOOT of the FP 5.500 amplifier is ONLY to be used on the SUB (subwoofer) output. The
central frequency is 45Hz for a Q factor equal to 1.
Connections and functions specific to the FP 1.800 and FP 5.500 amplifiers.
ት GAIN: the GAIN potentiometer enables you to raise the level of the incoming line level signal in the
amplifier for the subwoofer ONLY. WARNING: increasing the input gain does not mean more power,
but more noise. The voltage gain varies from 0.2V to 5V. This potentiometer should be adjusted at the same
time as the source level (car radio volume).
ቶ INPUT: many sources (car radio) only have one single stereo output (i.e. a pair of RCA) to feed the
line level signals to the amplifier. In order to power channels 1, 2, 3, 4 and SUB, you need a split
RCA cable. In this case, the low, medium and high frequencies will be transmitted to inputs 1, 2, 3,
4 of the amplifier. The very low frequencies of the SUB channel will be transmitted via inputs 1 and
2, and the INPUT button will be positioned on CH 1/2 to send the very low frequencies towards the
SUB channel, while maintaining control of the medium high frequencies on channels 1, 2, 3, 4.
SUB: the RCA inputs are intended to supply the low level (line level) signals of the source (car radio) towards
the SUB channel of the amplifier (where the source is equipped with several outputs).
ታ BASS BOOST 20/80Hz: 20/80Hz: the BASS BOOT 20/80Hz potentiometer allows you to select the
frequency band on which the level is to be raised through a BASS BOOST 0/12dB potentiometer. The BASS
BOOT Q factor is equal to 1.
ቴ MODE: the MODE button allows you to define the situation of the amplifier when using two FP 1.800
amplifiers. The one used upstream within the system MUST be in the Master position, while the second
should be in Slave position. The slave position automatically reverse the phase. The gain button is also
out of use. The gain level is the same than the master amplifier gain level. When connecting two FP 1.800
together, you must do the same settings on the Master amplifier and on the Slave amplifier (SUBSONIC,
BASS BOOST 0-12dB, BASS BOOST 20-80Hz, LO PASS and PHASE).
Connections and functions specific to the FP 5.500 amplifier
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