Metric Halo Mobile I/O - Manual (Page 344)

ULN-8/LIO-8 Jumper Settings
344
• J8 disables the phantom power supply
These should both be installed if no preamps are installed. They must be removed if any preamps are installed.
• J7 bypasses the front panel power switch. Installing a jumper at this site will provide constant power
from the 4 pin XLR power jack.
• J2 enables high power mode. It must be installed if any of the output jumpers are installed.
Figure H.7: PSU Jumper Sites