Applications; Connecting The Unit - Monacor PA SAM-1 Mode D'emploi

If the unit is to be put out of operation defini-
tively, take it to a local recycling plant for a
disposal which is not harmful to the environ-
ment.

3 Applications

The module SAM-1 is a completely assembled 120 W
power amplifier with power supply unit and has been
designed for installation into a 4 Ω or 8 Ω speaker cab-
inet. Due to the integrated 12 dB subwoofer cross over
network, both an active subwoofer cabinet and an
active full range speaker cabinet can be realized. The
module and the connected speaker are protected by a
24 dB subsonic filter and comprehensive protective cir-
cuits (against short circuit, overheating, direct voltage
content at the output).
It is the particular advantage of the SAM-1 when
operated as a subwoofer that this active subwoofer
can be placed at any location in the listening room. By
means of corresponding controls for the level and the
phase, an optimum adjustment to the main speakers
can be obtained.
4 Installation
WARNING
During installation, the module must
never be connected to the mains volt-
age!
1) For installing the module into the speaker cabinet,
saw a cutout of 140 × 250 mm. The required
mounting depth is 90 mm if the front panel is not
recessed.
2) Prior to the installation, adjust the operating mode
with the jumper S 2 (12) on the PCB:
position "Subwoofer"
operation as a subwoofer system; only the bass
frequencies are reproduced via the speaker con-
nected
position "Fullrange"
operation as a full range speaker system; all fre-
quencies are reproduced
3) Only speakers or speaker systems with a total
impedance of at least 4 Ω may be connected. Use
flat plugs to connect the speaker to the connection
OUTPUT (11) on the PCB. Observe the correct
polarity, i. e. connect the positive pole of the
speaker to the contact OUT+.
4) Screw the module to the cabinet by means of ten
M4 screws.
5 Operation

5.1 Connecting the unit

Prior to connecting the signal source or to changing
existing connections, switch off the active speaker
system!
The module SAM-1 is equipped with two inputs:
1. The phono jacks LINE IN (10) for signals with line
level for connecting e. g. preamplifier, mixer, equal-
izer, effect unit, etc.
2. The binding posts HIGH LEVEL INPUT (1) for con-
necting the speaker outputs of a power amplifier
Important: If the binding posts are used, the output
power of the connected power amplifier must not
exceed 272 W per channel at 4 Ω speakers or
136 W per channel at 8 Ω speakers, otherwise there
will be signal distortions due to overload.
Connection via a cable with phono connectors to the
LINE IN jacks is the easiest and safest solution. The
inputs HIGH LEVEL INPUT should only be used if no
line signal is available. Use speaker cables to connect
this input in parallel to the speakers of the power ampli-
fier.
When operated as a subwoofer or a mono active
speaker cabinet, always connect the left and the right
channels of the signal source. Both channels are inter-
nally combined to a mono signal. When operated as a
full range speaker cabinet for a stereo channel, only
connect the left channel or the right channel.
Be careful when connecting via binding posts!
a. In case of power amplifiers with a higher output
power than indicated above, there is an electric
shock hazard due to their high output voltage.
b. In case of an accidental short circuit, the power
amplifier may be damaged.
c. Observe the correct polarity for connection: Con-
nect the corresponding positive pole (marked cable
core of speaker) to the red binding post.
Finally connect the mains cable supplied to the mains
jack (3) first, then connect the mains plug to a socket
(230 V~ / 50 Hz).
GB
9