Buying “ older “ Devialet D-Premier...?

[ogs]

@Bertone No, there is no automatic update routine. All firmware updates are via the SD card method. I also think @Rufus McDufus is right that the 10.1.0 version is the latest firmware for the non CI Expert. I think a user on this forum @Rodney Gold is using D-Premiers. He would be the one to ask about firmware.
Which speakers do you use? Dynamic or electrostatic? With dynamic speakers I would not worry about 4 ohms or lower. The only speaker type reported to be "difficult" with Devialet amplifiers is eletrostatics, but even here I've seen reports of successful combinations.
My (modified) speakers are around 90dB efficient and close to 4 ohms. No problems.