© Impulse 2006
- 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).
- If there are pick-ups 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 tin
the cable ends or use multicore cable ends, spade terminals or
others. Gold-plated spade terminals are free of corrosion and have
the lowest contact resistance.
- Should all these measures be without any success, the use of a
ground loop isolator may solve the problem.
