18
FUNCTIONAL INSTRUCTIONS
OPERATING ELEMENTS
X-OVER
LP HP FULL
OFF VOX DC
LEVEL
INPUT
MIN
L R L R
MAX
AUTO
TURN-ON
INPUT
OUTPUT
QS–TWO
8
The
LEVEL INPUT
controller determines the input sensitivity of the amplifier to adapt to the output signal of the
head unit.
• Turn the LEVEL INPUT controller of the amplifier to the MIN position.
• Turn the volume controller of the head unit to 80 - 90% of its full setting.
• Turn the LEVEL INPUT controller clockwise until you hear some distortion.
• Then turn back the LEVEL INPUT controller slightly until you hear a cleaner sound.
6
7
8
9
6
If your head unit does not have a turn-on signal (REM), you can use the automatic turn-on function of the amplifier.
This works in two ways, which can be set at the
AUTO TURN-ON
switch:
VOX
: The amplifier then detects a voltage increase in the incoming audio signal when switching on the head unit
via the attached RCA cable and then switches on the amplifier. Recommended for the use with the pre-amplifier
RCA outputs of the head unit.
DC
: The amplifier then detects a voltage rise to 6 volts when the head unit is turned on by a so-called “DC offset”
and then turns on the amplifier. Recommended for the use with the speaker outputs of the head unit.
Note:
As soon as the head unit is switched off again, the amplifier switches itself off.
The terminal for the amplifier turn-on (page 15, section 2, REM IN/OUT) can now be used to supply additional am-
plifiers with a turn-on signal. Simply connect the REM terminals of the two amplifiers and make sure that the other
amplifier is in “normal” turn-on mode, which means that the
AUTO TURN ON
function is disabled.
7
The
X-OVER
switch selects the desired operating mode:
LP:
Lowpass mode: fixed at 80 Hz, frequency is limited upwards.
Use this switch position if you want to operate a subwoofer in mono mode.
HP:
Highpass mode: fixed at 80 Hz, frequency is limited downwards.
Use this switch position if you want to operate small to medium-sized loudspeakers.
FULL:
Fullrange mode: the entire frequency range is amplified.
Use this switch position if you want to operate medium to large speakers.
Do not connect loudspeaker cables with the vehicle’s chassis. Always ensure the correct polarity of all con-
nections.
NOTE
Summary of Contents for QS-TWO
Page 2: ...2...