To be honest I have no idea. I have never seen a stacked setup with an adat preamp added on so I'm not certain.
If I had to guess my answer would be... probably. I'm guessing that 2 of them act as one device under the driver with a limit on how many channels can be "seen" by the device.
If I had to guess my answer would be... probably. I'm guessing that 2 of them act as one device under the driver with a limit on how many channels can be "seen" by the device.