5 Operation
Note:
To prevent switching noise, always switch on
the signal source connected before switch-
ing on the amplifier module. After use, switch
off the amplifier module first.
1) Before switching on for the first time, set the
LEVEL control (5) to minimum (left stop) for the
time being. Switch on the amplifier with the
POWER switch (1). As long as no signal is
applied, the module is on standby to save power
and the LED STANDBY/POWER (4) shows red.
As soon as a signal is applied, the power ampli-
fier is switched on and the LED shows green.
2) Via the existing speaker system, reproduce
music, for example, and add the desired low
bass part with the LEVEL control (5). Only turn
up the control to such an extent that the sound
reproduced is not distorted.
3) Use the control CUT OFF (6) to set the upper
cut-off frequency of the subwoofer in such a way
that it will optimally complement the frequency
response of the other speakers.
4) When the speakers are placed at different dis-
tances to the listener, phase cancellation may
result (certain frequencies are reproduced at a
lower volume). To compensate this effect, shift
the phase of the subwoofer signal with the con-
trol PHASE (7).
Test the positions of the control to find the one
offering the bass reproduction of the highest vol-
ume at the listening position. Then readjust the
volume balance with the LEVEL control (5), if
required.
5) If there is no signal at the input for more than
approx. 25 minutes, the amplifier module goes
on standby: The LED STANDBY/ POWER (4)
shows red. If the amplifier module is not in use
for longer intervals, switch off the amplifier mod-
ule with the POWER switch.
6 Specifications
Amplifier power at 4 Ω/8 Ω
RMS power: . . . . . . . . . . . 300 W/150 W
Peak power: . . . . . . . . . . . 420 W/210 W
Frequency range
(upper cut-off frequency
is variable): . . . . . . . . . . . . . 20 – 40 … 200 Hz
Load impedance: . . . . . . . . . 4 – 8 Ω
Input impedance
LINE IN: . . . . . . . . . . . . . . 22 kΩ
HIGH LEVEL INPUT: . . . . 270 Ω
Input sensitivity
LINE IN: . . . . . . . . . . . . . . 170 mV
HIGH LEVEL INPUT: . . . . 1 V
Input voltage max.
LINE IN: . . . . . . . . . . . . . . 7 V
HIGH LEVEL INPUT: . . . . 20 V
THD: . . . . . . . . . . . . . . . . . . < 0.1 %
S/ N ratio: . . . . . . . . . . . . . . . > 70 dB
Power supply: . . . . . . . . . . .
230 V~ / 50 Hz
Power consumption
Full load: . . . . . . . . . . . . .
440 VA
No-load: . . . . . . . . . . . . . . 2
4 VA
Standby: . . . . . . . . . . . . . < 0.5
W
Ambient temperature: . . . . . 0 – 40 °C
Dimensions: . . . . . . . . . . . . . 188 × 255 × 90 mm
Weight: . . . . . . . . . . . . . . . . 1.6 kg
Subject to technical modification.
CAUTION
Never adjust the speaker system to a
very high volume. Permanent high
volumes may damage your hearing!
Your ear will get accustomed to high
volumes which do not seem to be that
high after some time. Therefore, do
not further increase a high volume
after getting used to it.
10
GB
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.
Summary of Contents for SAM-300D
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