After the amplifierhas been installedand all connectionshave been made careful
-lyand securely, turn theradio on sothat the amplifieris switched on automatically.
After a shortpower-on period, theamplifier reaches itsfull performance.
Now turn upthe volume slowlyusing the volumecontrol of theradio. If there is no
sound or onlya distorted replay, switch offthe radio immediately, the amplifierwill
also switch offautomatically,and check ifall connections havebeen made correctly.
POWER=LED POWER INDICATOR
After the orderlyconnection of thethree power terminals,the LED indicatorshines
green and goesout with off.
PROTECT =LED PROTECTIONINDICATOR
This set is equipped with anoverload protection, immediately upon overloading
due to shortcircuit or muchincreased temperature theoverload protection is
activated and thered LED indicatoris shining. Throughthis the amplifieris
protected against damage.In case ofthe thermal protectiona certain shortcooling
time must beallowed after whichthe amplifier automaticallyresumes operation.
LEVEL CONTROL
The input levelcontrol allows thesystem to workwell within awide range of output
level. Choose theadjustment in theway that you achieve a sound most possibly
without any distortion.as a guidelinethe following procedure is recommended:
If you useseveral amplifier,the adjustment hasto be madefor each setseparately,
tune up thevolume of yourcar radio to2/3 of themaximum volume.
Now turn thegain control ofthe amplifier from" Min " to " Max" direction until you
can hear distortions. Then turn the levelcontrol a littleback to "Min ". The gain
control adjustment isfinished now.
Attention! If you use2 Ohm speakersin stereo mode.Tri-mode or4 Ohm speakers
in bridge modeand the overloadprotection is triggered, turn the gain control to
" Min "direction, until theoperation is freeof trouble.
HIGH PASS ANDLOW PASS CONTROLS
This amplifier has controls for makinggood sound
combination.
high pass andlow pass
OPERATION INTERFERENCE
Use only ascreened audio cablefor the wiringbetween " lowlevel in " of the
amplifier and RCAor DIN outputof the radio.
Lay the signal, speaker and power cables separately with enough distance
from one anotherand also fromeach other carcable. lf notpossible, you can
lay the circuitand ground cable together with the serial cables. Audio and
speaker cable shouldbe as faraway from theseas possible. The REM cableto
the automatic antennaoutput of the radio can belaid together with the signal
cables.
Avoid groundloops by laying the ground wiringof all componentsto a center
point in astar-like way. You can find the best central point in measuring the
voltage directly atthe battery. Now comparethis voltage valuewith the chosen
ground point andthe (+) terminal of the amplifier. lf the measured voltage in
only less different you've found thecorrect central.Otherwise youhave to look
for another point. Youshould measure withthe ignition being switched on and
additionally switched on other electronics (rear window heating and light ).
If there arepickups from external electrical sources into the speaker cables,
divide the coreleads and twistthem together.
If there arenoises from the car electronics. Add an interferencesuppression
choke to thepower wiring .
If there are huming noises, use thicker ground cablesor add furtherground
cables to thechassis.
Toreduce contact resistance and bad andloose contacts, pleasetin the cable
ends or use multi core cable ends, spade terminals or others. GoldPlated
spade terminal are free of corrosion and have thelowest contact resistance.
Should all these measures to without any success. theuse of aground loop
isolator may solvethe problem.
All cables aresources of interference. The power cable and RCA audio cable
are very proneto interference; theremote cables areless prone . There is often
interference caused bythe generator (piping), ignition ( cracking) or other car
electronic parts. Mostof these problemscan be eliminatedby correct and careful
cabling. In doingso, these arethe following guidelines: