AXTON AXB20STP Bedienungsanleitung Seite 5

WIRING & INTERfERENCE
All advice on wiring, controls and adjustments is based on the assumption that
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you are thouroughly acquainted with all the requirements and features of the entire
audio equipment – especially the head-unit – connected to this powered subwoofer!
All cables are sources of interference. The power cable and RCA audio cable are very
prone to interference; the remote cable far less. There is often interference caused by the
alternator (buzzing or whining), ignition (crackling) or other car electronics parts. Most of
these problems can be eliminated by correct and careful wire routing. In doing so, read the
following guidelines first:
Use only a double-shielded RCA interconnects for the wiring between RCA input of the
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amplifier and line-outs of the head unit.
Lay the signal and power cables separately with enough distance from one another and
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also from each other wire harness in the car. The REM cable to the automatic amp remote
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
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compare this voltage value with the chosen ground point and the (+) terminal of the
amplifier. lf the measured voltage offers less than 0.1 V difference you've found the correct
central, which should be clean and uncorroded. Otherwise you have to look for another
point. You should measure with the ignition being switched on and additionally switched
on other electronics (rear window heating and lights). If there is noise pickup from external
electrical sources try to route the RCA interconnect with a different path to the active sub.
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