5
C. CROSS OVER SELECT SWITCH (STEREO CHANNELS ONLY)
Used to select between
high pass
fi
lter
and
full range
output (channel 1 & 2) or low
pass
fi
lter and full range output (channels 3 & 4). The high pass
fi
lter will only allow high
frequency information to be passed to the speaker(s) whilst the full range output will pass
all frequencies to the speaker(s). Similarly the low pass
fi
lter will only allow low frequency
information to be passed to the speaker(s).
D. CROSS OVER FREQUENCY CONTROL
The HPF control speci
fi
es which frequencies
above
the set level will be heard (channel 1 & 2).
The LPF control speci
fi
es which frequencies
below
the set level will be heard (channel 3 & 4). The
frequency ranges from 50 Hz to 300 Hz.
E. SUBSONIC CROSSOVER SWITCH
When set to 50 Hz frequencies between 50 Hz and 300 Hz will be output. When set to 15Hz,
frequencies between 15 Hz and 300 Hz will be output.
F. BASS BOOST CONTROL (CHANNELS 3 & 4 ONLY)
To provide up to an extra +12 dB of bass boost at 45 Hz. Use this boost to increase bass output from
the ampli
fi
er.
G. BASS BOOST CONTROL (SUBWOOFER ONLY)
To provide up to an extra +18 dB of bass boost at 45 Hz. Use this boost to increase bass output from the
ampli
fi
er to the subwoofer.
H. PHASE SELECT SWITCH
Use this to invert speaker output 180°, default is 0°. One setting will make the bass from the subwoofer
sound better matched with the front speakers.
I. BASS REMOTE INPUT JACK
Use to plug in the remote bass controller.
J. BASS REMOTE CONTROLLER
This remote can be mounted in the front of the car and will give you the ability to adjust the gain of the ampli
fi
er
remotely.
K. SPEAKER TERMINAL OUTPUT
For connection to the speakers. See system wiring overleaf for wiring examples.
L. FUSE
Please ensure the following fuse rating is used when replacing fuses:
FLI UNDERGROUND 1000.5 (35 amp x 2)
M. POWER CONNECTIONS
Power connections. See overleaf for details on correct connections.
N. POWER PROTECT LIGHT
When the ampli
fi
er is operating correctly the light will illuminate constant ‘green’. When the ampli
fi
er is in power
protecttion mode the light will illuminate ‘red’.
Set Up Section
To correctly set the gain control of the ampli
fi
er to match that of the source (headunit) use the following setup
routine:
• Turn the gain control to minimum on the ampli
fi
er.
• Ensure the bass boost is set to 0 dB.
• On the headunit set all crossovers to
fl
at and both bass and treble to zero.
• Turn up the source (headunit) to approx 3/4 volume.
• Very slowly turn up the gain on the ampli
fi
er until distortion can be heard in any of the speakers or until
the volume reaches an uncomfortable listening level when this is reached turn down the gain control
slightly.
• The gain control is now set.
The setting of the crossover will depend on what kind of speaker you are installing. For a subwoofer
it is recommended that the crossover is set to
low pass
and the frequency is set to match that of
the speaker speci
fi
cations. For a pair of full range speakers it is recommend that the crossover is
set to
full
. For a pair of speakers with a passive crossover it is recommended that the crossover
is set to
high pass
and the frequency is set to match that of the speaker speci
fi
cations.
NOTE: BY USING THE CROSSOVERS CORRECTLY YOU WILL NOT ONLY
LENGTHEN THE LIFE OF YOUR SPEAKERS BUT WILL ALSO GET BETTER
PERFORMANCE FROM THEM. TO OPTIMISE YOUR SETUP SEEK THE ADVISE
OF A PROFESSIONAL INSTALLATION ENGINEER OR VISIT YOUR LOCAL FLI
AUDIO DEALER.
