The DC blocking board is used in combination with a Loudspeaker Line Isolation System. It connects in the loudspeaker line and provides a tap-off connection for a loudspeaker. Its coupling capacitor blocks DC and protects from overload by limiting the current. It uses detachable screw connectors, which allow for a quick and convenient connection of the loudspeaker loop and tap-off connections (maximum 20 W loudspeaker load). The DC blocking board can be mounted inside selected Bosch loudspeakers or in its own IP30-rated housing.