ART Pro Audio SMS226 - Speaker Management System - Manual (Page 6)

3
INSTALLATION
The ART SMS226 may be used in a wide variety of applications and environments. Housed in a rack-
mountable, all-steel enclosure, the unit is designed for continuous professional use. Mounting location is not
critical, however, for greater performance reliability, we recommend that you not place the unit directly on top
of power amps, or other sources of heat and/or strong magnetic fields
AC Power Hookup
The ART SMS226 has a high efficiency universal power supply. Connect the unit to mains power of the type
marked on the rear panel. The power source must provide a good ground connection, and the ground pin on
the mains plug should never be defeated.
Set the ground Lift switch to GND to start for safe system operation. If you find this selection creates a ground
loop in your system, you can place the switch in the LIFT position.
Analog Audio Connections
Audio connections to and from the SMS226 are all balanced with the following wiring:
Rear panel balanced inputs: [XLR] Pin 2 = Hot (+), Pin 3 = Cold (-), Pin 1 = Ground
Rear panel balanced outputs: [XLR] Pin 2 = Hot (+), Pin 3 = Cold (-), Pin 1 = Ground
Front panel balanced input: [XLR] Use the Apex 220 measurement microphone only.
FIGURE 1
– Rear panel
Note: When connecting the outputs to your system, the SMS226 will default to using odd numbered output
channels for the "A" input and even numbered channels for the "B" input. It will also default to using CH1 for a
woofer and CH3 for a tweeter. If you have chosen 2x2+1 mode, CH5 and CH6 are used for the sub-woofer
connection.
You can override any of these settings manually.
USB connection
The USB connection allows access to the SMS226 using a PC. System and user preset info can be saved
and restored or all of the parameters can be adjusted from the PC instead of using the front panel interface.
Note that the front panel interface is disabled when using the USB interface.