Installation
Your Soundigital amplifier needs the correct cables and
electrical system.
The protection fuse/circuit breaker must
be installed at a max distance of 30cm (1
foot) from the battery.
Minimum capacity of the battery
25Ah
50Ah
25A
10mm² / 7 AWG
Recommended capacity of the battery
Fuse/circuit braker size
Size of recommended cable
Use good quality cables (copper if possible) for the connections
to the amplifier.
Unplug the negative (-) terminal of the
battery before proceeding with any
electrical installation in the vehicle to
avoid fire starts, wounds or damage to
the amplifier.
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.
Remove de paint between
the terminal and chassis
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.
Securely mount the amplifier so that it does not come loose
in the event of a collision or a 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.
