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Connections, features and controls
ቢ INPUT(S): the RCA sockets are used for input of the line level signal.
NOTE: the RCA inputs on the FP 4.75 and FP 5.500 model amplifiers relate to channels 1, 2, 3 and 4.
ባ LINE OUT: the RCA sockets enable a second amplifier to be connected into an existing system, without
having to install additional RCA cables to connect the front of a vehicle with an additional amplifier.
NOTE: the FP 5.500 amplifier system does not include a LINE OUT output.
ቤ GAIN: you can adjust the level of input signals to the amplifier using the GAIN potentiometer.
NOTE: increasing input gain does not mean more power, but rather more noise. Gains in voltage vary
from 0.2V to 5V.
NOTE: the GAIN potentiometers on the FP 4.75 and FP 5.500 models can ONLY be used on channels 1,
2, 3, and 4. The GAIN potentiometers located at the top of control panels on the FP 4.75 and FP 5.500
amplifiers relate to channels 1 and 2, whereas those located at the bottom correspond to channels 3 and 4.
This potentiometer must be set depending on the level of the source (level of line output). Start by putting
amplifier gain at its lowest level. Gradually increase the level (volume) of the source to 75% of maximum.
Increase the amplifier gain level until the required listening volume is reached. Lower the level should sound
distortion occur.
If you are using the amplifier in conjunction with one or more subwoofers, the “GAIN” control will enable
you to set the levels of the subwoofer(s) in relation to that of sub-systems that are amplified by the source
(i.e. the car radio, etc.) or by another amplifier. Set the source at a medium volume level, and then set
amplifier gain in order to obtain consistent sound levels from kits/sub-systems and from the subwoofer(s).
ብ HI PASS (high pass): the HI PASS potentiometer lets you set the HI PASS filter frequency. The value selected
is the frequency above which the signal will be amplified.
NOTE: the FP 1.800 amplifier has a HI PASS filter called SUBSONIC.
NOTE: the HI PASS feature on the FP 4.75 and FP 5.500 amplifiers ONLY works on channels 1, 2, 3 and 4.
The HI PASS potentiometers located at the top of control panels on the FP 4.75 and FP 5.500 amplifiers
relate to channels 1 and 2, whereas those at the bottom correspond to channels 3 and 4.
Example: X-OVER in HPF position, HI PASS set to 80Hz: The full range kit connected to the amplifier will
reproduce an amplified signal at 80Hz and above.
ቦ X-OVER (filter mode): the X-OVER switch enables you to switch on either a high pass filter (a HPF), a low
pass filter (an LPF) or to not activate any filter at all (Full mode)..
NOTE: the X-OVER switch located at the top of the control panel on the FP 4.75 amplifier relates to
channels 1 and 2, whereas that at the bottom corresponds to channels 3 and 4.
NOTE: the FP 1.800 amplifier does not have an X-OVER switch.
NOTE: the X-OVER feature on the FP 5.500 amplifier ONLY works on channels 1, 2, 3 and 4. This
X-OVER switch enables you to switch on, according to your requirements, a high pass filter (a HPF), or not to
activate any filter (Full mode). The X-OVER switch located at the top of the control panel relates to channels
1 and 2; whereas the one at the bottom corresponds to channels 3 and 4.
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notice amplis focal power gb.ind16 16notice amplis focal power gb.ind16 16 28/09/06 16:12:0128/09/06 16:12:01