A M P L I F I E R S
ENG
INSTALLATION INSTRUCTIONS
General:
Run the wiring so that RCA cables are at least 18“ away from power and
speaker cables. Keep RCA cables away from electrical devices in the vehicle
that can cause electrical noise, such as electric fuel pumps, emission control
modules and other on-board electronic modules.
Power and ground connections:
Use a sufficient gauge power cable and ground cable using the chart below
as reference to what size wire you require. Discus series amplifiers require at
least 1
2
power wire. In a multi amplifier system, add the total value of
the manufacture recommended fusing to get your total system amperage.
Some
req
fuse right at the battery
fused distribution block near the amplifiers. It is then a simple matter to
connect the +12 volt terminal of each amplifier to the distribution block.
During this process, please ensure that the main power fuse is removed to
avoid shorting the electrical system. The main fuse must be within 30 cm of
the vehicles battery
poss
2
wi
to the size of the amplifiers’ power wire. Use a ground distribution block, if
you
distribution block to the chassis as short as possible , not more than 30 cm.
The ground
way
round crimp lug, crimped and soldered to the ground cable. The next step is
to sc
at the connection
the lug hole, and use a bolt, spring washer and nut to securely fasten the
ground lug. Use petroleum jelly to coat the bolt/lug connection, to prevent
oxidization with time.
TIP:Us
equipment for that matter - run short individual grounds from each piece
directly to
power
reliability
exposed metal in the vehicle, causing short circuits to the chassis.
Safe connection sequence:
After all cables are run, connect speaker
then run
tu
bloc
with
Power up the system:
The following procedure may seem like overkill, but there is nothing more
frustrating when turning on a system for the first time, and it does not work
properly immediately
controls to minimum (counterclockwise), including the head unit volume
control. Set all equalizers to 0 dB (no boost), and all crossover frequency
controls at approximate frequencies, as recommended by the loudspeaker
manufact
appl
If the fus
we
a
fine, turn off the head unit, and install fuses in the remaining amplifiers, one
by one, till the complete system is powered up and functioning properly
General:
At
High Pass:
-When in Hi P
your sy
from
point. EXAMPLE: If you adjust the High P
play frequencies below 1
chosen Low P
-When in Low P
cut off for your system reproduction aka Subsonic Filter
set it at cuts off any frequencies from repr
o’cloc
to 25Hz, the amplifier will not play frequencies below 25Hz but will play
frequencies from 25Hz to the chosen Low P
-When in Flat/Full operation, the High P
Bass EQ:
This setting is a fixed bass boost at 45Hz that is variable from 0-9dB. This
feature provides impact to your bass, but if not adjusted correctly
ove
tur
to exceed the 12 o’clock position unless listening at a low volume or a low
recording quality as this can result in high distortion and possibly clipping.
Low Pass:
The Low P
right of the desired setting to be reproduced. Turning the potentiometer all
the way to the right i
P
play frequencies from 120Hz to the chosen Hi P
-When in Hi P
Level Control Setup:
Ensure that the Level is turned completely to the left prior to turning the
system on. Next you should insert a CD or cassette that you are familiar with
to use as a ref
its full setting. The system sound level will of course be very low
following procedures will help you to match the amplifier input sensitivities
properly to the head unit output signal level. It is important to match the
amplifier LEVEL input sensitivity to the Radio/CD output sensitivity
be
then adjust the amplifier LEVEL input to 2 volts.
If you are not sure what the Radio output sensitivity is, follow these
general guide lines:
Turn the level control up slowly
degrees
will need to turn the Level to the left a bit and then try again. If you reach a
point where the output does not increase, stop turning the Level control to
the right as the amplifier/speaker combo has reached its maxx output in this
application.
2 or 3 way active systems (all):
Alw
its control up to the point where distortion is audible, and back it off some.
Now adjust the level control for the highs or tweeter channels in a 2 way
active system, to balance the highs to lows. In a 3 way active system, match
the midrange level to the bass, and then the highs to the midrange and bass.
It may be necessary to perform a few iterations of the midrange and highs
level control settings to achieve a satisfactory sound balance.
SETTING UP SYSTEMS AFTER
INSTALLATION FOR BEST PERFORMANCE
