My new (to me) 552 DR seems to be going through another ‘shrill’ stage at the moment, which is typical now I’ve got an hour or so to sit down and listen! Fleetwood Mac’s Rumours last sounded beautiful on my 282/ Supercap DR but I’m having to keep the volume low or it’s too “shouty” through the 552 at the moment.
I purchased it recently and it went to Naim to for both the head unit and power supply to be fully serviced and the head unit additionally had a new volume pot fitted. It came back a little over two weeks ago. After a few hours warm up, I had about 36 hours of utter joy and then the rollercoaster started! Don’t get me wrong, there have been days since when it shows true moments of greatness but typically when I get a moment to enjoy it, it’s having one of its ‘turns’! I guess this may be exasperated by having both units serviced at the same time, so I’m trying to be patient - after all, it’s only been just over two weeks.
Having searched the forum, there’s not much about the run in characteristics for the 552, or the time it takes for them to disappear. When my 282 head unit was serviced last year, it didn’t seem to manifest the same issue, just got subtlety better over time, so I guess the power supply has some effect here?
Anyway, just wondered if other 552 owners have had a bit of a rollercoaster ride with their units running in too, whether from service or new?