These are designed to interface to the new Stereo Out 1U, upcoming Stereo In module and to the Pedal I/O (you can use either pair of jacks as the send/returns) plus Mixups as well. They are also still compatible with the Audio I/O 1U 1U module.
Customers can upgrade their older cases with these boards. Very easy to install; just unscrew the 4 jack nuts and swap in the new board!
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