Setting up 120 Expert from scratch

[Jean-Marie]

The card with firmware on, needs to be inserted only once. The firmware get copied.

On the other hand, the card with the dp_cfg.txt needs to be permanently in the D120. If there is no card, the D120 returns to the default config.

@Jean-Marie's statement that the card with the configuration file on it needs to be permanently in the D120 is not quite correct, nor is the statement that without the card the amp returns to the default factory configuration. In practice, however, you would leave the card permanently in the slot as he suggests unless you want to load a different configuration file or update the firmware.

The reason for this is that the amp loads its configuration during startup and the configuration it loads remains active until the amplifier is turned off or a restart occurs. During startup the amp checks whether a card with a configuration file is present in the card slot and if a card is there the amp loads the configuration file from the card, otherwise it loads the factory configuration. If you start the amp with a card in the slot you can remove the card and your configuration will remain active while the amp remains on but if you turn the amp off and do not insert a card with a configuration file on it before turning the amp on again the amp will start up in factory configuration when you turn it on.

But let's say the amp is in factory configuration because you turned it on without a card in the slot or you started the amp with a card in the slot and then removed the card so the card slot is vacant while the amp is on. If you insert a card with a configuration file in the slot while the amp is on the amp will immediately turn off and restart  loading the configuration in the card you just inserted.

So, if you aren't going to change your configuration or update your firmware, leave the card with your configuration file on it in the card slot as @Jean-Marie said. Your configuration will then always load automatically whenever you turn the amp on. Just don't put a card in the slot while the amp is on unless you want to restart the amp with the configuration on the card you're inserting

yes @David A is correct, I did a shortcut by only considering states persisting an on/off operation.

Jean-Marie