10
English
SUB
LEVEL
GREEN – ON
RED
– STAND-BY
SUB
CROSSOVER
LEVEL
SUB
PHASE
SAT
CROSSOVER
100 Hz
FREQUENCY
40Hz
SUB-BOOST
GROUND
LIFT
POWER
LINE IN
SAT OUT
230V~ / 50 Hz / 300VA
HIGH LEVEL INPUT
LEFT
RIGHT
RIGHT
LEFT
SAM-2
ACTIVE SUBWOOFER MODULE
T3.15AL
MIN
MAX
50Hz
150Hz
0
0
180
30Hz
50Hz
50Hz
150Hz
100 Hz
GND
LIFT
250
W
MAX
• 200
W
RMS
/ 4
Ω • 125
W
RMS
/ 8
Ω
+ 6dB
°
°
14
15
13
9
3
4
5
6
7
8
1
11
10
12
2
5.2 Outputs
Connect the RCA jacks SAT OUT (15) to the inputs
of a stereo power amplifier operating the satellite
speakers .
In case of separable full amplifiers of high qual-
ity provided with a controlled preamplifier output
(possibly marked “Pre Out”) and a power amplifier
input (possibly marked “Amp In”), it is also possible
to insert the module SAM-2 into the full amplifier:
Connect the jacks LINE IN (14) to the preamplifier
output and the jacks SAT OUT (15) to the power
amplifier input .
5.3 Power supply
Finally connect the supplied mains cable first to
the mains jack (11) and then to a mains socket
(230 V/ 50 Hz) .
6 Operation
Any adjustments and sound evaluations must only
be made in connection with the satellite speakers .
The sound should be evaluated at the final place
of hearing where a second person at the active
subwoofer should be instructed to find the best
adjustment .
1) Switch on the active speaker system with the
switch POWER (10) . As long as no input signal
is available, the system is in the power-saving
stand-by mode and the LED indicator (2) shows
red . As soon as an input signal is available, the
power amplifier is switched on and the LED
shows green .
If no signal is available, the active speaker
system will return to stand-by (LED = red) after
approx . 7 minutes . If the active speaker system
is not used for a longer period, it should be
switched off with the switch POWER, otherwise
the stand-by mode will always have a low cur-
rent consumption .
If the automatic switchover between stand-
by and operation does not function optimally,
the switch-on threshold can be modified in the
range of 1 – 10 mV . The control for the switch-on
threshold is in the position RVa on the PCB of
the preamplifier (see page 35) . The further the
control is turned clockwise, the higher the input
level at which the module will be switched on .
2) If a ground loop has been created by the con-
nection, humming will occur (e . g . with music
passages of low volume) . This ground loop can
be interrupted with the groundlift switch (9) .
On the other hand, the amplifier is not shielded
from electric noise fields if the front plate is not
grounded . In case of doubt, set the switch
alternately to find the best adjustment .
3) Use the control SUB CROSSOVER (4) to adjust
the upper crossover frequency, i . e . the fre-
quency which is not to be reproduced any more
by the subwoofer (the lower the upper cross-
over frequency, the more difficult the acoustic
localization of the subwoofer; the higher the
crossover frequency, the more powerful the bass
support) . In most cases, shelf speakers and small
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