Triple channel Format Bridge
FB3 allows sharing signals between Eurorack and systems using 4mm banana connectors usually found in modular synthesizers in 4U format, like Buchla and Serge.
The ready-to-play version is available in 2 variants, to better accommodate with your existing setup.
The ground is accessible on the back of the unit via a screw terminal and can be connected to the system ground, or used to transport ground from one FB3 to another.
It's important to connect the ground between systems before sharing any signal.