I have been listening to DX Max for about 4 months now.
I remember I was kind of overwhelmed when switching from unbalanced to balanced mode first time in my life.
I again and again depending on the song felt frequencies like upper mids to be too striking, high frequencies being to bright.
and then I think I got somehow used to it.
I have never in my life heard a dac/amp that was so revealing and spatious without compromise.
I felt like I needed some more lush alternative.
That's where the DX300 comes into play now.
When first listening to it I was at first missing the uncompromised clarity of the max in direct comparison.
But I think it's maybe not fair to judge in that way because your judging is based on listening habbits.
I can bet after listening for several hundred hours to dx300 and then go back to Max I will find it far too bright