Alesis DM Pro Reference Manual page 150

Advanced Trigger Information
This is a common way to hook up a pad for a Snare. Many companies sell "dual-
zone" pads which will give you the option to assign one Drum to the center of the
pad and another to the edge of the pad (typically assigned to Snare and Sidestick
sounds, respectively). This type of pad would also be useful for triggering the two
Hi-hat Triggers (Triggers 13 and 14). But you can use this sort of pad for any of the
TRS Trigger Input jacks.
The TRS jacks are used to reach Trigger Inputs 2/3, 7/8, 9/10, 11/12, and 13/14.
1 5 0 DM P R M
RO EFERENCE ANUAL