Toxic TX-400 Mode D'emploi page 28

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.
INTERFERENCE
All cables are source of interference or gather them. 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 (crackling) or other car electonic parts. Most of these problems can
be eliminated by correct and careful cabling. In doing so, there are the
following guidelines:
- Use only a shielded audio cables for the wiring between „low level in" of
the amplifier and RCA or DIN outputs of the radio.
- Lay the signal, speaker and power cables separately with enough
distance from another and also from any 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
centre 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 the measured voltage is only less different, you have found the correct
central. Otherwise you have to look for another point. You should
measure with the ignition being switched on and additionally switched on
consumers (rear window heating, light etc).
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© Toxic 2004