The Universal Sound
44 45
The Universal Sound
LRx 3.1MT
LRx 5.1MT
Owner’s manual
General Precautions
• This symbol indicates that you have to pay attention to these
instructions. Disregarding them might cause accidental harms or
damage your amplifier.
• Before installing the amplifier, make sure you carefully read and
understand all instructions.
• The vehicle electric system must have 12 VDC voltage with negative to
ground. Make sure your car has it in order to avoid any damages to your
amplifier and to the vehicle.
• Pre-plan the configuration of your new amplifier and the best wiring routes to ease installation.
• Always wear protective eyewear when using tools that may generate splinters.
• During installation, keep the amplifier in its packing as long as possible; this will protect it from
damages.
• Secure all auxiliary devices you built to install the components to the vehicle structure through
brackets, screws, nuts and bolts; this insures stability and safety while driving.
• The amplifier detachment while driving can damage the people in the vehicle and other cars.
Secure the amplifier at best, paying utmost attention if installation is inside the passenger’s
compartment. Use extra fixing systems if installation occurs inside the engine compartment.
• Before installing the amplifier, turn off the source and all other electronic devices in the
audio system for preventing any damages.
• Make sure the location you chose for the components does not affect the correct functioning of
the vehicle mechanic and electric devices.
• Do not run the cables or install the amplifier next to electronic gearcases.
• Use extreme caution when cutting or drilling the car plate, checking there are no electrical wiring
or structural element underneath.
• Before connecting the power cable to the amplifier, disconnect the negative lead ( - ) from the car
battery.
• Make sure power cable is not short circuited during installation and connection.
• Power cable must have mechanically resistant and self-extinguishing insulation.
Its section has to comply with what is suggested in this manual. Avoid to run it over or through
sharp edges or close to moving mechanical devices. Make sure it is well fixed all along its length.
Block positive and negative cables just close to the amplifier respective power supply terminal
blocks through a clamping screw.
• Use rubber grommets to protect the wire if it runs in a hole of the plate or proper materials if it is
close to heat-generating parts.
• To ground the device ( - ) in the right way, use a screw in the vehicle chassis; scrape all paint or
grease from the metal if necessary, checking with a tester that there is continuity between the
battery negative terminal ( - ) and the fixing point. If possible, connect all components to the same
ground point; this solution rejects most noise.
• Route all signal cables close together and away from power cables.
• Never run cables outside the vehicle; you would not be protected against wear and in case of
accidents.
• When installing speakers and the cables that connect them, make sure that non-insulated parts
never touch the vehicle cutting parts. If they do, the amplifier protection is activated.
• To prevent all problems, use very good quality cables, connectors and accessories, choosing
them in CONNECTION Audison catalogue.
• When installation is over, and before plugging the main power supply fuse, check the system
wiring and make sure all connections were done in the right way.
• Power amplifiers put an increased load on the battery and on its charging system.
We recommend checking your alternator and battery condition to ensure they can handle the
increased consumption. Standard electrical systems which are in good condition should be able to
stand this extra load without problems but we recommend the use of an energy storage capacitor
and/or a battery for high level audio systems.
• Put a fuse and its insulated fuse holder 40 cm max. far from the battery positive terminal; connect
one end of the power cable to it after connecting the other end to the amplifier. The fuse value
must be 50% higher than the amplifier built-in one. In case the cable supplies several amplifiers, the
fuse value will have to be 50% higher than the sum of the values of all other fuses in the amplifiers.
• There must be good air circulation where the amplifier is installed; this area must not be affected
by humidity, rain, external deposits or parts coming from the vehicle mechanical devices. Don’t
cover ducts for forced cooling.
• Install the amplifier in the vehicle parts where temperature is between 0°C (32°F) and 55°C
(131°F).
WARNING. When working in demanding conditions, the amplifier can reach temperatures of
around 80 – 90°C (176÷194°F). Make sure it is not dangerously hot before touching it.
• Periodically clean the amplifier without using aggressive solvents that might damage it. Dampen a
piece of cloth with water and soap, wring it and clean the amplifier. Then use a piece of cloth
dampened with water only; eventually clean the amplifier with a dry piece of cloth.
• Remove dust and solid deposits from the ducts where air goes in and out. Don’t use compressed
air on the grilles without removing them, since it would push solid parts in the amplifiers.
If necessary, please contact a specialised service centre for internal cleaning.
Air ducts obstruction makes the amplifier go in safety.
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