Magnat ULTRA 4000 Manual Del Propietário página 13

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First connect the amplifier's GND terminal to the battery's minus pole. It is very important

that the connection is good. Dirt residues must be carefully removed from the battery's

connection point. A loose connection may cause malfunctions or interference noise or

distortion.

The +12 V amplifier connection must then be connected with a power cable possessing

an integrated fuse to the battery's plus pole. The fuse should be located close to the

battery; for safety reasons, the cable from the positive terminal of the battery to the fuse

must not exceed 60 cm in length. Only insert the fuse when all installation work, including

the connection of the loudspeakers, has been completed.

Now connect the car hi-fi receiver's remote control connection to the amplifier's REM

control jack. A cable with a cross-section of 0.75 mm² is sufficient for connecting the

amplifier's REMOTE connection and the control device.

4.2 AUDIO CABLES

When installing the audio cable between the cinch output of your car receiver and the

cinch input of the amplifier inside your car, the audio and power supply cables should,

wherever possible, not be routed along the same side of the vehicle. We recommend an

isolated installation, e.g. routing the power cable through the cable duct on the left-hand

side and the audio cable through the cable duct on the right-hand side or vice versa. This

reduces interference due to crosstalk into the audio cables.

4.3 LOUDSPEAKER CONNECTIONS

In normal operating mode (i.e. one loudspeaker on each individual amplifier

channel), the lowest terminal resistance is 2 ohm per channel.

In bridging mode (two amplifier outputs combined) the lowest terminal resistance

doubles to 4 ohm.

The impedance in tri-mode may not fall below 2 ohm per channel.

Never connect the loudspeakers' minus terminals to the vehicle chassis.

Never connect the +12 V supply voltage to a loudspeaker output as this would

destroy the amplifier final stage.

If the amplifier is operated with lower terminal resistances or incorrectly used as

described above, both the amplifier and the loudspeakers may be damaged. The

warranty becomes void in such cases.