Protective Circuits - Monacor SAM-2 Mode D'emploi

3) Use the control SUB CROSSOVER (4) to adjust
the upper limit frequency, i. e. the frequency which
is not to be reproduced any more by the subwoofer
(the lower the upper limit frequency, the more diffi-
cult the acoustic localization of the subwoofer; the
higher the limit frequency, the more powerful the
bass support). In most cases, shelf speakers and
small free-standing speakers are optimally com-
pleted with a limit frequency adjusted between
60 Hz and 100 Hz.
4) Adjust the volume ratio to the other speakers with
the control SUB LEVEL (3). Thus, a natural or a
deliberately amplified bass reproduction can be
adjusted.
5) Adjust the phase for the subwoofer with the control
SUB PHASE (7). According to the acoustic condi -
tions, this adjustment is more or less audible. The
phase can best be adjusted during a music piece
with an electric bass, a contrabass, or a deep bass
voice. Set the control SUB PHASE to the bass
reproduction of the highest volume. Slightly turn
back the control SUB LEVEL, if required.
6) Use the control SUB-BOOST LEVEL (6) to boost
certain frequencies in the low bass range up to
6 dB. Adjust the frequency for the bass boost with
the control SUB-BOOST FREQUENCY (5).
7) Adjust the lower limit frequency for the satellite
speakers with the control SAT CROSSOVER (8),
i. e. the frequency not to be reproduced any more
by the satellite speakers. Thus, the amplifier for the
satellite speakers will be relieved from the low fre-
quencies.

7 Protective Circuits

For protecting the power amplifier of SAM-2 and the
subwoofer connected, various protective circuits are
provided:
1. In case of a short circuit or direct voltage content at
the output for the subwoofer, the module will imme-
diately go on stand-by. Switch off the module with
the switch POWER (9) and ask skilled personnel to
eliminate the problem. Switching off the module will
reset the protective circuit.
2. In case of overheating, the module will also go on
stand-by. Ventilation of the heat sink (2) must be
improved. After cooling down to normal operating
temperature, the module will be switched on again.
8 Specifications
RMS output power
at 4 Ω speaker: . . . . . . . . 200 W
at 8 Ω speaker: . . . . . . . . 125 W
Music output power
at 4 Ω speaker: . . . . . . . . 250 W
at 8 Ω speaker: . . . . . . . . 180 W
Frequency range
subwoofer output
lower limit frequency: . . 20 Hz
upper limit frequency: . . 50 – 150 Hz adjustable
output SAT OUT
lower limit frequency: . . 50 – 150 Hz adjustable
upper limit frequency: . . 20 kHz
Low bass boost: . . . . . . . . . . up to +6 dB/30 – 50 Hz
THD: . . . . . . . . . . . . . . . . . . < 0.1 %
S/N ratio: . . . . . . . . . . . . . . . > 70 dB
Min. load impedance
for the subwoofer: . . . . . . . . 4 Ω
Inputs
LINE IN: . . . . . . . . . . . . . . max. 4.2 V/20 kΩ
HIGH LEVEL INPUT: . . . . max. 44 V/17 kΩ
Power supply: . . . . . . . . . . . 230 V~/50 Hz
Power consumption
at full load: . . . . . . . . . . . . 300 VA
at no-load: . . . . . . . . . . . . 19 VA
on stand-by: . . . . . . . . . . .
Automatic switch-on
Switch-on threshold: . . . . 1 – 10 mV
Stand-by activation: . . . . . after approx. 7 minutes
Ambient temperature: . . . . . 0 – 40 °C
Dimensions (W × H × D): . . . 185 × 370 × 89 mm
Required cabinet cutout: . . . 155 × 340 mm
Mounting depth
without front panel: . . . . . . . 85 mm
Weight: . . . . . . . . . . . . . . . . . 4.9 kg
Subject to technical modification.
All rights reserved by MONACOR ® INTERNATIONAL
GmbH & Co. KG. No part of this instruction manual
may be reproduced in any form or by any means for
any commercial use.
RMS
RMS
RMS
RMS
corresponds to
480 W at 4 Ω or
240 W at 8 Ω
6 VA
without input signal
GB
9