In current V-Drums modules - such as the TD-17, TD-27, and TD-50/TD-50X - the BT-1 Bar Trigger Pad has two different Pad/Trigger Types to choose from;
"BT1"
"BT1 SENS"
Choosing "BT1 SENS" as the Pad/Trigger Type for the input will increase the sensitivity and detection for softer strikes on the BT-1. It can also improve the overall velocity (soft to hard hit) range.
It's important to note that choosing BT-1 SENS for the input may increase the possibility of the BT-1 being triggered by erroneous vibrations from other pads.