Since I run my Arye QX 5 Twenty direct to my A 65 I have the gain set to -12 db so that the average listening level is around 70 to 80 on the QX 5 this sounds best on my room and set up.
Running dac direct to amp with a lower signal to noise ratio is clearly audible and most dac,s running direct sound better in the higher volume range then the lower half. When I had the matching C3800 I was running max on the amp and - 18 on the pre as I recall.
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