It looks to me like you are having a problem either loading firmware or the configurations. If something is going wrong with firmware at this first stage, then clearly you will have problems trying to swap between dual mono and bi-amp.
Also, it might help is you advise some details of your computer you are using to make the SD cards, are you using Mac or PC, what Internet browser are you using, and so on.
I have some initial thoughts as to what might be problematic. Firstly, you can load the firmware and configurations in separate stages and via separate SD cards. The method of loading firmware and configurations is slightly different. To understand this and get clarity on what is happening I suggest that you load the firmware and configurations in separate stages via separate SD cards, by doing this you will observe what is working or not, step by step. Lets say you are just trying to get the same firmware loaded on both machines. You can make an SD card with the just the firmware, to do this the SD card needs to be unlocked to write to it. When you load the firmware into the Devialet, you need to lock the card. Otherwise the Devialet will write a file to the SD card, this is to stop the Devialet re-loading the firmware every time you use the amp. By locking the card, the file is not written, so you can use this same SD card to load the firmware into each of your Devialet's. Once you have both amps on the same firmware, you can then start trying different configurations, using separate SD cards with just the configuration for each amp loaded, so the firmware remains unchanged once it is correct. If you still have problems loading firmware and configurations step by step, you can then at least let the forum know at which step it is going wrong, this will make it easier for the specific issue to be isolated. My guess is that if you take it slowly, step by step by step, suddenly this will all make sense. Also, on some Devialet models higher capacity SD cards have been problematic, 4GB cards always work, and there have been reports of higher capacity cards being OK on the Pro models, just a thought, maybe you are running very high capacity cards? One point to note, recently Oxford Audio have been experimenting with bi-amp Devialet set ups. They work, and they are running the latest firmware. So you should be able to get this up and running. Good luck!
Also, it might help is you advise some details of your computer you are using to make the SD cards, are you using Mac or PC, what Internet browser are you using, and so on.
I have some initial thoughts as to what might be problematic. Firstly, you can load the firmware and configurations in separate stages and via separate SD cards. The method of loading firmware and configurations is slightly different. To understand this and get clarity on what is happening I suggest that you load the firmware and configurations in separate stages via separate SD cards, by doing this you will observe what is working or not, step by step. Lets say you are just trying to get the same firmware loaded on both machines. You can make an SD card with the just the firmware, to do this the SD card needs to be unlocked to write to it. When you load the firmware into the Devialet, you need to lock the card. Otherwise the Devialet will write a file to the SD card, this is to stop the Devialet re-loading the firmware every time you use the amp. By locking the card, the file is not written, so you can use this same SD card to load the firmware into each of your Devialet's. Once you have both amps on the same firmware, you can then start trying different configurations, using separate SD cards with just the configuration for each amp loaded, so the firmware remains unchanged once it is correct. If you still have problems loading firmware and configurations step by step, you can then at least let the forum know at which step it is going wrong, this will make it easier for the specific issue to be isolated. My guess is that if you take it slowly, step by step by step, suddenly this will all make sense. Also, on some Devialet models higher capacity SD cards have been problematic, 4GB cards always work, and there have been reports of higher capacity cards being OK on the Pro models, just a thought, maybe you are running very high capacity cards? One point to note, recently Oxford Audio have been experimenting with bi-amp Devialet set ups. They work, and they are running the latest firmware. So you should be able to get this up and running. Good luck!
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