"Filters" like "chokes" help to eliminate spurrious electrical noise. These "noises" can affect the other electrical signals in the unit causing unexplained operation, "spikey" displays or other unusual display. The filter only works to eliminate if the outside influence noise is present. Otherwise the operation is unaffected.
If your buddy has no "noise" problem without a filter your unit will function just as his does. Go ahead and plug into this power.
Chuck