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D
INTRODUC
TION
12
11
INPUT PANEL
1
Power In
. PowerCON® type-A mains power socket. An appropriate power cable is included in the
package. The SMX 12A is built for two operating voltage ranges: 100-120 and 200-240 VAC.
2
Power Out
. PowerCON® type-B mains power output to link power between several units.
The recommended maximum quantity of units to be connected in series is 3 for 100-120 VAC
mains, and 6 units for 200-240 VAC. This is calculated for a standard 16 A mains supply.
3
Line In
. Balanced line-level input with female Neutrik® XLR-3 connector to connect input signal.
The input accepts levels up to +20 dBu.
For an optimal signal-to-noise ratio, it is recommended to input signals with a level of at least
0 dBu.
It is possible to chain up to 10 SMX 12A signal inputs. A built-in output buffer amplifier prevents
any load problem for the signal source, like a mixer.
4
Line Out
. Balanced and buffered line-level output with male Neutrik® XLR-3 connector. It shall be
used to link other SMX 12A speakers or other components of the system like subwoofers.
5
Power
. Switch to turn the unit on and off.
To avoid clicks and pops, turn on SMX 12A last and turn it off first before other connected
devices. After turning the unit off, wait for more than five seconds before turning it on again.
The internal voltage needs 5 seconds to drop completely, otherwise the power supply will
not start up.
LED INDICATORS
The intended use and application of SMX 12A makes it preferable, not to have any blinking, disturbing lights.
Hence we refrained from adding signal or limit indicators.
1
Protect
. Lights red if the amplifier or SMPS has short-circuited or overheated and the amplifier output
is muted automatically. In that case, turn off the mains switch and wait for the unit to cool down.
Upon reaching normal operating conditions, turn on the mains switch and the device reverts to
normal operating mode. If it does not, SMPS or Amplifier is damaged by other reason than overheating
or short circuit.
2
Power
. Lights green once the system is properly connected to the mains power and switched on.
1
3
2
4
5
Figure 3.
SMX 12A input panel.
Figure 4.
SMX 12A LED panel.
2
1
