The mono position, if you have connected a subwoofer in a bridged mode.The
phase can now be shifted by turning on the potmeter of the right channel..
Adjusting the phase is not an easy job.You have to listen very carefully to hear
the difference.The best way to do it is to play some music you know very well
and has a lot of vocals in it. When you start adjusting you can hear the vocals
shifting over your front stage. Ask someone to help you with this fine tuning.
In that way you can remain seated in your car and listen to the changes in the
music, while the otherone adjusts the phase by turning slowly on the potmeters.
The phase-shift is variable from 0 to 180 degrees. Allthough your amplifier is
equipped with these phase-shift controls, it is not always necessary to use them.
So if you don’t know if you have a phase problem, or can’t hear the difference if
you are adjusting the phase, leave the phase control untouched and consult your
local Caliber dealer. He is trained for this job, and will be willing to help you.
Variable Crossover
A Caliber Competition Pro amplifier has a variable
crossover for each pair of channels. It can be
switched into FullRange (Off-position), LowPass
(put it on the LPF-position in the middle) or to
HighPass (in which case you have to slide it all the
way to the left in the HPF-position).
Once you have selected the position in which you want that pair of channels to
play, you can start adjusting the filterfrequency by turning on the frequency pot-
meter.The filterfrequency is variable between 50Hz and 250Hz.You get the best
result if you play several parts of music you know very well, whenyou are adjus-
ting your filter. Always adjust every pair of speakers separately.You can turn of
your other pair(s) of speakers and/or your sub’s, by simply disconnecting the
input RCA’s for these channels. In this way you will be able to hear every reac-
ting this speakerpair gives you when you are adjusting them. Do the same thing
if you want to adjust your subwoofers. Let the sub’s play alone, and listen care-
fully to the reactions to the music.
Golden Rule
It is lots of fun to adjust your amplifier, but you can easily overdo it.There is one
golden rule you have to remember: Before you start tuning your amplifier, always
turn the input level all the way down to a minimum (15V). Then you can safely
adjust all the options your amplifier offers you. Once you have fine tuned the
sound to your likings, you can slowly turn your input level up a bit, untill you
hear your amplifier starting to clip (or look at the clipping LED’s). Once your
amplifiers clips, you have given it to much input level, so you will have to turn it
down a little. In this way you will get the maximum power from your amplifier,
without the danger of damaging your speakers or subwoofers.
On top of your Competition Pro Series amplifier you will find the build-in top-
controls.The 2-channel amplifiers have one set of controls for right/left.The 4-
channel amplifiers have two sets of controls, one for front left/right and one for
rear left/right, The 6-channel amplifiers have 3 sets of controls, one for front
left/right, one for rear left/right and one for the subwoofer channel.
Equalizer
These topcontrols have a 7-band equalizer for each channel (exept the subwoofer
channels on the 6-channel amplifier). Normal equalizers adjust the sound for
both the right and the left channel. By separating the equalizers for the left and
right channel you are able to adjust the sound in your car very precisely. Since,
in a car, you are sitting at the driversseat you don’t hear the same sound from
your right speakers, as you do from your left speakers (One side is further away
from you, while the other side is positioned differently to your ears, so every
side gives you a different sound). By adjusting the right- and the left channel
separately you can make them sound the same.
All the 7 frequences we selected for you on this equalizer are the ones that have
the most influence on the total audio spectrum.
Level Control
Before adjusting the equalizer, make sure that your input level is set
to a minimum (Note: the minimum is 15V, not 0,5V).
Every input level control controls a pair of channels (left and right)
per control unit. So for 4- channel amplifiers turn down two level con-
trols (front and rear). For 6-channel amplifiers you even have to turn
down 3 level controls (front, rear and subwoofer). In this way you will have
enough headroom to adjust your equalizer correctly, without your outputsignal
starting to clip before the adjustment is finished.
Variable phase control.
Each pair of channels (left/right, front/rear and subwoofer) has a variable phase
control, for eliminating every eventual phase problem
that will occur. Phase problems can occur for
various reasons; the use of passive filters, the diffe-
rence in path length, unwanted reflections or others.
The phase control switch has three positions. The
off position for if you do not need to use the phase control.The stereo position,
if you have connected both right and left speakers, you can shift the fase separately
for the left or right channel by turning the potmeters.
LEVEL
15V
0.5V
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•
•
50Hz 250Hz
FREQUENCY
VARIABLE CROSSOVER
HPF LPF OFF
CLIPPING
RIGHT/
MONO
LEFT
STEREO
VARIABLE PHASE CONTROL
MONO OFF
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
50Hz
250Hz
1kHz
2.5kHz
5kHz
7.5kHz
10kHz
