Operation Manual

Now connect the car hi-fi receiver’s remote control connection to the amplifier’s REM control jack. Acable

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.

5. OPERATING ELEMENTS AND IN/OUTPUTS

5.1 SETTING THE INPUT SENSITIVITY

The input sensitivity may be adapted to any car radio or tape deck. Turn the volume control of your radio

to its central position and then adjust the input-level control (5) to produce an average medium volume.

This setting usually provides sufficient power reserves at optimum weighted noise voltage.

ATTENTION: only reproduce loud test noises briefly to prevent damaging the loudspeakers.

5.2 LOW-PASS FILTER WITH ADJUSTABLE CROSS-OVER FREQUENCY

If the amplifier is used as a subwoofer amplifier, set the switch (3) to “LPF”. Set the desired cross-over

frequency with the control (4). This makes the filter adaptable to the installed woofer’s sound requirements.

The filter’s high edge steepness is responsible for the precision reduction of medium and high frequency

ranges.

5.3 HIGH-PASS FILTER WITH ADJUSTABLE CROSS-OVER FREQUENCY

If the amplifier is to be used as an amplifier for satellite loudspeakers (mid-range/tweeter loudspeakers),

set switch (3) to “HPF”. Set the desired cross-over frequency with the control (4). Only the frequencies

above the set cross-over frequency will then be amplified. This effectively minimizes distortions caused

by excessive membrane movement at low frequencies and small satellite loudspeakers without reducing

the bass level.

5.4 BASS-BOOST

The bass-boost function (2) is used to increase or equalize the lower bass frequencies.