Magnat PHANTOM 4000 Mode D'emploi page 11

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
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 AND SUBSONIC FILTER WITH ADJUSTABLE CROSS-OVER FREQUENCY
Set the switch (1) to "LPF" if you want to use Channels 1/2 or 3/4 respectively for the subwoofer amplifier. Set the
desired cross-over frequency with the control (3). This makes the filter adaptable to the installed woofer's sound
requirements. The filter's high edge steepness is responsible for the precise reduction of middle and high frequency
ranges.
Channel 3 and 4 only:
The subsonic filter prevents distortions in subwoofers which can be caused by subsonic frequencies. Set the desired
cross-over frequency with the control (6).
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 (1) 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 (CHANNEL 3 AND 4)
The bass-boost function elevates or distorts the lower bass ranges. Infinitely variable accentuation level using control (2).
5.5 OUTPUTS FOR CONNECTING ADDITIONAL AMPLIFIERS
The input signal of the LINE INPUT connections 1CH and 2CH is forwarded directly to the LINE OUT 1CH and 2CH
jacks. The LINE OUT connections allow the use of additional amplifiers without requiring additional T-plugs and cables.
All manuals and user guides at all-guides.com
GB GB
11