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 (6) 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 (1) to “LOW”. Set the desired cross-over
frequency with the control (2). 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 (1) to “HIGH”. Set the desired cross-over frequency with the control (3). 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 SUBSONIC FILTER
The subsonic filter (4) attenuates the lowest bass frequencies. This arrangement allows efficient prevention of
distortion caused by excessive membrane excursions without affecting the useable bass level.
5.5 BASS-BOOST
The bass-boost function (5) is used to increase or equalize the lower bass frequencies.
5.6 OUTPUTS FOR CONNECTING ADDITIONAL AMPLIFIERS
The input signal of the INPUT connections L and R (8) is forwarded directly to the OUTPUT (9) L and R jacks.
The OUTPUT connections allow the use of additional amplifiers without requiring additional T-plugs and cables.
FIG. 1 POWER SUPPLY / REMOTE SWITCH-ON CONNECTION
(1) Terminal for + 12 V battery voltage
(2) REM terminal for remote switch-on
(3) GND terminal for the ground, to the battery’s minus pole
(4) Battery
(5) Cable fuse
(6) To your car radio’s automatic aerial connection
If your car is not equipped with an automatic aerial connection, connect this cable’s plus pole (+) to the
ignition lock. An on/off switch should be inserted in this case. Make sure that this switch is switched off if
the amplifier is not used.
