The MQA files seem to me to sound better with HS Output set to N.

The soundstage opens up. Some of the treble harshness -eg the violins in the Mozart -seem less strident.

Can this be the case or is it me listening too late at night?

.???????????

Main system: NUC, Roon, Network Acoustics Ag ENO/cable, 218, 5200SE, Townsend Podium, Sennheiser HD820/800s, Sennheiser HDVA 820 amp.
Mobile: Explorer, IE800
Kitchen: MS200, F80