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8
Operating The ZM Series
Setting up the ZM series
Setting up your ZM Series is a simple procedure, which takes
only a few minutes:
Remove all packing materials (save them in case of need
for future service) and decide where the amplifier is to be
physically placed—it can be used table-top or mounted in a
standard 19” rack (like the SRK equipment racks from Samson),
requiring only two rack spaces.
Install the rack ears by aligning them to the side of the unit,
flush to the front and install the supplied screws. Be careful
not to cross thread the screws. Then, remove the feet to allow
the unit to fit the 2 rack spaces.
When installed, make sure that both the front and rear panels
are unobstructed and that there is good ventilation around
the entire unit (we recommend the use of spacer panels,
especially if multiple amplifiers are used in a rack.
Connecting the Speakers to the ZM Amplifier
Make the speaker connections, using the Euroblock output
connectors on the rear panel. It is never a good idea to power
up any amplifier that is not connected to loudspeakers. When
operating using the 4-ohm output, any loudspeakers with
a minimum impedance load of 4 ohms (that is, 4 ohms or
greater) can be used.
For 70-volt operation, connect the positive input of the
speaker to the 70 Volt terminals and connect the negative
input the COM (ground) terminal.
The constant voltage output is set for either 70 or 100 Volts
depending on the country, however if can be changed by re-
configuring the internal transformer wires. Locate the T10, T11,
T12 and T13 terminals as per the diagram below.
Now follow the wiring chart below to select the required
operating voltage for constant voltage output.
-
+
8Ω 8Ω
4Ω
-
+
-
+
OUTPUT
COM
Constant Voltage 100V/70V/25V Lo-Z
OR
OUTPUT
C
OM
C
onsta
n
t
V
oltage 100V/70V/25V
L
o-Z
-
+
+
-
+
-
+
-
Matching
transformer
-
+
12


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