DigiTech HardWire V-10 Owner's Manual page 12

5. DC Power Output Jacks 7-8 - These two outputs provide independently
selectable 9VDC or 12VDC power. These outputs are mergable, allowing
for connection of "power hungry" pedals which require more current. The
maximum allowable current draw on each of these outputs is 150mA
(unmerged). When merged, these outputs can provide a shared total of
300mA of available current (see "Specifications"). Note that even when these
outputs are merged, they can still be independently set to 9VDC or 12 VDC.
6. Merge Status LED 7-8 - This yellow LED indicates the merge status of
outputs 7 and 8, illuminating when these outputs are merged.
7. DC Power Output Jacks 9-10 - These two outputs are independently
selectable and provide either fixed 9VDC power or variable 5-9VDC power.
The maximum allowable current draw on each of these outputs is 150mA (see
"Specifications").
8. Trim Control (Output 9) - When power output 9 is configured for
variable operation, use a flat-head screwdriver or the tip of your finger to turn
this trim control to adjust the output's voltage.
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