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After the amplifier has been installed and all connections have been made carefully and securely, turn the radio
on so that the amplifier is switched on automatically. After a short power-on period, the amplifier reaches its
full performance.
Now turn up the volume slowly using the volume control of the radio. If there is no sound or only a distorted
replay, switch off the radio immediately - the amplifier will also switch off automatically - and check if all
connections have been made correctly.
GAIN = INPUT LEVEL CONTROL
The input level control allows the system to work well within a wide range of output level. Choose the
adjustment in the way that you achieve a sound most possibly without any distortion. As a guideline the
following procedure is recommended:
If you use several amplifiers, the adjustment has to be made for each set separately. Tune in the volume of
your car radio to 2/3 of the maximum volume. Now turn the gain control of the amplifier from "Min" to "Max"
direction until you can hear distortions. Then turn the level control a little back to "Min". The gain control
adjustment is finished now.
Attention!
If you use 2 Ohm speakers in stereo mode. Tri-mode or 4 Ohm speakers in bridge mode and the
overload protection is triggered out, turn the gain control to "Min" direction, until the operation is free of
trouble.
X-OVER FREQUENCY CONTROL
A).
When the crossover control is in the Low-Pass position, this control becomes active allowing you to
select your crossover point.
B). When the crossover control is in the High-Pass position, this control becomes active allowing you to
select your crossover point.
CROSSOVER SWITCH
Full: full range frequency.
Low pass: the lower frequency under setting point can be pass.
High pass: the higher frequency above setting point can be pass.
BASS BOOST CONTROLS
This amplifier has Bass controls for making good sound combination.
FUSE
The amplifier is equipped with a plug-in auto fuse protecting the set against fault conditions. Do not use a
fuse with a higher value and never bridge the fuse over, as this may lead to irreparability damage so that any
claim for warranty is denied.
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No Function:
The connection cable is not connected correctly (=te12V/GND/REM). Ensure that all connections
and mechanic contact and that the jacket has been removed. The fuse is defective-pay attention to the
correct value of a new fuse!
No Sound :
Speaker cable or speaker plug are not connected correctly.
No Sound / Red LED Protection Shines :
The plus and minus wires of the speaker cable have contact, thus eliminate the short circuit. If you use a 2
Ohm speaker in stereo mode, a 4 Ohm speaker in bridge mode or tri-mode and the set is overloaded, then
turn the gain control to "min" until the operation is free of trouble.
Poor Sound Quality (Distortions) :
The speakers are overloaded ,therefore turn down the volume level and check the volume control
positions.
No Stereo Sound And A Weak Bass :
Speaker cables (+) and (-) are mixed up, unit wired out of phase.
GND(-) = GROUND CONNECTION
Connect the GND terminal to the chassis ground of your car and take care of best electric and mechanic
contact. In doing so, drill a hole into the car chassis near the amplifier then remove color, dirt or any other
substance from the ground point . Thereafter fasten the cable end with added ring terminal by using a screw.
Ensure that the ground connection is as short as possible and that the cable diameter is sufficient (min
4mm"). Route the ground cables from the radio and all other equipment parts, like equalizer, active
crossover network or other amplifiers, to the same ground point.
+ 12V = POWER SUPPLY
Connect the BATT terminal to the positive pole of the battery with a lead cable and add a fuse into the power
cable in a distance of not more than 30 cm from the battery. The lead cable's diameter should be at least 4
mm' for a length of 3 m and 6 mm" for a length of 6 m.
REM(ON/OFF) REMOTE CONTROL
Connect the REM terminal to the automatic antenna connector of your car radio. Now when turning on and
2
off your car radio. the amplifier automatically switches ON and OFF. A cable diameter of 0.5 mm is
sufficient.
All cables can source and create interference. The power cable and Cinch/RCA audio cable are very prone to
interference; the remote cables are less prone. There is often interference caused by the generator (piping),
ignition (cracking) or other car electronic parts. Most of these problems can be eliminated by correct and
careful cabling. In doing so, here are the following guidelines:
Use only a screened audio cable for the wiring between "low level in" of the amplifier and RCA or DIN
output of the radio.
Lay the signal, speaker and power cables separately with enough distance from one another and also from
each other car cable. If not possible, you can lay the circuit and ground cable together with the serial cables.
Audio and speaker cable should be as far away from these as possible. The REM cable to the automatic
antenna output of the radio can be laid together with the signal cables.
Avoid ground loops by laying the ground wiring of all components to a center point in a star-like way. You can
find the best central point in measuring the voltage directly at the battery. Now compare this voltage value
with the chosen ground point and the (+) terminal of the amplifier. If measured voltage is only slightly
different, you've found the correct central. Otherwise you have to look for another point. You should
measure with the ignition point for earth being switched on and additionally switched on consumers (rear
window heating and light).
If there are pickups from external electrical sources into the speaker cables, divide the core leads and twist
them together.
If there are noises from the car electrics, add an interference suppression choke into the power wiring.
If there are humming noises, use thicker ground cables or add further ground cables to the chassis.
To reduce contact resistance and bad and loose contacts, please solder the cable ends or use multi core cable
ends, spade terminals or others. Gold Plated spade terminal are free of corrosion and have the lowest
contact resistance.
Should all these meaures be without any success, the use of a ground loop isolator may solve the problem.
OPERATION
HOW TO PROCEED IN CASE OF FAULTS
INTERFERENCE
