Alesis 1622 - Appendix

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APPENDIX
There may be situations that arise that the 1/4" type outputs of the 1622 MIXER must be
interfaced to a balanced XLR type input. This is fairly easy to do and will have no effect on the
performance of the unit. There are two methods to accomplish this since there is currently no
adhered to international standard.
METHOD A
The published Audio Engineering Society standard for the pin out of an XLR connector is:
Pin 1 Ground
Pin 2 +
Pin 3 -
To change this connection from balanced to unbalanced, simply solder pins 1 and 3 together.
See Figure 17A.
This convention is followed throughout most of the world, except for the United States. If you
are connecting the 1622 MIXER to a device of European origin, chances are it is probably wired
this way. Check your owners manual to be sure.
METHOD B
The typical way that an XLR connector is wired in North America is:
Pin 1 Ground
Pin 2 -
Pin 3 +
To change this connection from balanced to unbalanced, simply solder pins 1 and 2 together.
See Figure 17B.
This convention is followed only in the United States. If you are connecting the 1622 MIXER to
a device made for the American market, chances are it is probably wired this way. Check your
owners manual to be sure.
If you have chosen the wrong method of wiring, DON'T WORRY since you cannot harm your
1622. The audio quality may suffer slightly, however, due to possible phase cancellation. If you
are unsure, try both ways and chose the one that sounds best!
FIGURE 19
1
2
3
1
2
3
SHIELD
HOT
HOT
SHIELD
WIRING OF UNBALANCED XLR
METHOD A - EUROPEAN EQUIPMENT
METHOD B - AMERICAN EQUIPMENT