He sure did but he was the only one. As far as I know no one has actively compared the valve mode to an actual tube system to see how close it comes. As an aside, it was interesting that if my memory serves me correctly, I watched the review (I think it was for the A70 & D70 pair) highly...

This is probably in the DAC space through DSP, and some of the DACs already try this, like the Topping D70 Pro SABRE has "valve" and "transistor" modes. Not sure how many people see it as anything more than a gimmick though. It seems like something that should be able to be simulated and be...

So where would this warmth manifest itself? Frequency response? Is this measurable at all?

Amir measured the A70pro and said it was “exceptionally flat too 100khz” but you say it has a mid bass bump? Wouldn’t that show up on his graph? Genuinely confused.

What happens if you're on VU mode and you change the volume? Does the volume screen come on momentarily so you can see the level? Also is there an auto-power off function (yet)?