220 to 440 ROI

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And what Astra provides to address aging DAC or any other point of Expert in any case? The problem with Devialet architecture is DAC is the core of the amp, even if you feed it with an external DAC or DDC via AES still Devialet does one more DA coversion on the aging DAC

No problem if feed via AES as AES is digital already, there is no digital conversion for AES input.

As a reminder: DAC is short for Digital to Analog Converter.  The DAC @ada refers to is in the heart of the Devialet's ADH core and is an integral part of the power amplifier through which all inputs eventually flow, so the DAC imposes the same limitations (if any) for AES as for any other input.  (Unless you're only using the pre-amp output of the Devialet and not the power amplifier.)