Installation And Connection; Power Supply - IMG STAGE LINE SAM-300D Bedienungsanleitung

3 Applications
This amplifier module is designed for installation
into a subwoofer speaker cabinet which is used to
complement existing speaker systems with low fre-
quencies when a convincing bass reproduction is
required.
The module is provided with a low-pass filter
with adjustable cut-off frequency (40 – 200 Hz) and
a control to correct the phase in combination with
other speakers. The amplifier has a limiter to pro-
tect the speaker.
The power amplifier is designed as a class D
amplifier. It is supplied with power from a switch-
mode power supply. Thus, it has an extra high effi-
ciency at a low weight.
Instead of connecting the module to signal
sources with line level, it is also possible to connect
it to the speaker outputs of a power amplifier.
4

Installation and Connection

WARNING When installing the amplifier module,
always disconnect it from the mains.
For operation, the module must
always be installed; otherwise you
will risk an electric shock.
1) To install the module, saw a suitable cutout
(approx.
240 mm × 165 mm
inet.
2) Only connect speakers or speaker systems with
a total impedance of at least 4 Ω. Connect the
speaker via the two cables coming from the
PCB. Always observe the correct polarity: con-
nect the positive pole of the speaker to the red
cable (marked "SP+" on the PCB); connect the
negative pole to the black cable (marked "SP-"
on the PCB).
3) Insert the module into the speaker cabinet.
Make sure that there is sufficient space for the
module inside the cabinet and that there is no
risk of contact with other electroconductive com-
ponents or heat-sensitive materials. When the
front plate is not recessed, the required mount-
ing depth is 65 mm. Do not stretch or squeeze
the connection cables.
4) Use ten screws (∅ ∅ 4 mm) to fasten the front
plate of the module to the cabinet.
5) When setting up a single subwoofer, it is not
important to place the subwoofer exactly in the
middle between the stereo speakers as it will not
) into the speaker cab-
be possible to precisely locate the very low fre-
quencies reproduced by the subwoofer. How-
ever, do not place it too close to walls or in cor-
ners; this would distort the frequency response.
Prior to making connections or changing any exist-
ing connections, switch off the amplifier module
and the units to be connected.
4.1 Connecting a signal source
Connect a signal source with line level (e. g. output
of a mixer or preamplifier) to the RCA jacks LINE IN
(8). When connecting a stereo signal source, a
mono signal is internally created. It is also possible
to connect the jack L/ LFE to an LFE output. In
multi-channel systems for cinema applications,
e. g. "5.1", the LFE channel is used for low-fre-
quency special effects ("Low Frequency Effect" or
"Low Frequency Enhancement").
Alternatively, connect the screw terminals HIGH
LEVEL INPUT (10) to the speaker outputs of a
power amplifier [in parallel to the speakers con-
nected there]. Connect the left channel to the ter-
minal pair "L", connect the right channel to "R".
Observe the correct polarity: Always connect the
positive pole (marked core of speaker cable) to the
red terminal.
Caution!
Only connect amplifiers with a maximum output
G
voltage of 2 × 20 V (corresponding to an output
power of 2 × 100 W at 4 Ω or 2 × 50 W at 8 Ω) to
these terminals.
When connecting the screw terminals, make sure
G
that the cable ends are only stripped for the
length required and that no bare wires protrude
(hazard of contact and short circuit).
4.2 Signal output
At the RCA jacks LINE OUT (9), the input signal is
available for being routed to another amplifier or
active speaker system. The position of the controls
LEVEL (5), CUT OFF (6) and PHASE (7) has no
effect on this output signal.

4.3 Power supply

Connect the mains cable provided to the mains
jack (2) and the plug to a mains socket (230 V~/
50 Hz).
GB
9