Soundigital 400.2D EVO, Owner'S Manual

Page: 7 / 16

5
For proper operation, your Soundigital amplifier needs
the correct size of cables and electrical system. Refer to
"Power supply table" in the technical specifications in this
manual to get this information.
Warning!
Installation Tips
The ground cable should be the shortest possible and
should be connected to the chassis of the vehicle. The
surface should be sanded at the contact point to create a
clean, metal-to-metal connection between the chassis
and the termination of the ground wire.
Keep the RCA cables together, but away from the power
or the audio output cables and away from electric
equipment such as electronic fuel injection centrals,
electric engines, etc.
Never connect or disconnect the RCA
cables with the amplifier on, because it
may damage the headunit or the
amplifier.
When passing cables through metallic walls, use rubber
grommets to avoid damage to the cable and short
circuits.
Choose a proper place to install the amplifier and avoid
blocking the side ventilation panels.
Warning!
Warning!
Warning!
Warning!
The protection fuse/circuit breaker must
be installed at a max distance of 30cm (1
foot) from the battery.
Securely mount the amplifier so thet it does not come
loose in the event of a colision or sudden jolt to the
vehicle. Avoid mounting it on metallic parts of the vehicle,
because it may cause an earth loop (you might have
noise issues).
Be careful when drilling holes in the
vehicle. Verify if you're not drilling holes
in the fuel tank, brake lines or electrical
cables of the vehicle.
Use speakers accordingly to the power and impedance of
the amplifier. Verify if the adjustment filters can be used to
increase the performance of the equipment.
Never use speakers with impedance
under the nominal impedance of the
amplifier or you may damage it.
To avoid unwanted noise in the system, join the
ground points of the equipment and audio output to
only one point.
After the end of the electrical installation, connect the
negative cable of the battery and, before starting the
audio system, check if all connections are correctly done.
To adjust the gain control, use the headunit volume at
70%, playing music. Increase slowly the gain of
channels 1-2 until you can notice the distortion. Reduce
the gain slightly until you have a clean signal. Repeat this
procedure for channels 3-4.
Some headunits with high voltage output on the RCA,
may cause the amplifier to reach maximum output even
with gain control near minimum position. In this case,
limit the volume of the headunit before the point where
you can hear distortion.
Adjust the high pass and low pass filters according to
your speaker specifications. In case of doubt, please
refer to your speaker manual.
Gain positioning over the correct spot
may cause noise, protection or damage
to the speakers.
INSTALLATION
Use good quality cables (copper if possible) for the
connections to the amplifier.
Remove de paint between
the terminal and chassis