Is there an optimal start-up sequence for a Phantom Blocker?

Before you connect the device you wish to shield from phantom power, make sure your phantom blocker is attached to the cable and have phantom power engaged. Wait 5 seconds, during which phantom blockers internal bleeder resistors will cancel out voltage differences. Connecting in this order prevents the transfer of an initial AC voltage burst created by the phantom power switching on.

Phantom power can be applied to either the male or the female side of phantom blocker’s XLR connector and will not reach the opposing XLR connector, the audio signal travels without restriction in both directions.