Wavtech link2 Owner's Manual page 9

Internal Jumper Locations and Settings
While all Wāvtech models provide external controls for main adjustments, there
are also a few internal configuration jumpers available to resolve certain special
vehicle or system conditions. The link2's internal jumper locations and default
settings are shown in the illustration below. To access these jumpers, simply
remove the two top screws from each end panel and loosen two bottom screws
on one side in order to easily remove the chassis top cover. It is recommended
to detach the power supply connector first to ensure that the unit is completely
powered off while making any jumper changes.
Notes:
Ÿ
Input sensitivity range jumpers (20V/40V) are independent for each SPK
input channel, so may be set differently between channels as system
conditions require.
Ÿ
Load bypass jumpers (LOAD) are independent for each SPK input channel
and must be removed or moved to a single pin in order to disconnect the
internal loading from that channel.
link2
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