plastic penguin said:
...but due to their less than benevolent impedence and dbs (sealed box to boot), if you need to play at low level (8 o'clock on the dial) or below they are found wanting.
Although I am not a fan...
Here are Streophile's measurements of the ATC SCM11...
http://www.stereophile.com/content/atc-scm-11-loudspeaker-measurements
... the comments are quite illuminating. It seems members of their review team had no difficulty driving them with an Arcam Solo-Mini (25 watts per channel) and Peachtree Nova. This was ascribed to the SCM11s generally easy load. (PP, your MA RS6s actually dip lower - to 4.5 Ohms minimum - than the ATCs do, so your 'less than benevolent' comment is a bit exaggerated.)
However, they were measured to be less sensitive than quoted (nearer 82dB than 85dB) so a higher powered amp is sensible if you want to push them.
As I said, I'm not a fan. That's after many, many hours (hundreds now) listening to SCM11s and a Primare i30 with various sources from analogue (Rega P3) to iPlayer (CA Dacmagic connected via optical digital and balanced analogue) and a range of material from light and symphonic classical to Dan le Sac & Scroobius Pip and most things in between.
I found them over-harsh (except when playing CDs on a Rega Apollo) when playing loud and 'ordinary' at low volume levels. But the owner loves them so this is really down to taste. I never got around to trying them with my old Naim system. Who knows? They might have been to my liking in my room and system.
I would ban the use of the words 'monitor' and 'studio' when naming domestic hi-fi speakers. It gets everyone all panty-bunched over something that has absolutely no relevance to playing music in the home. But they all do it don't they?
Oh, PP, some of the best speakers I have ever owned in the last 30 years were sealed cabinet designs. It has zip to do with performance at lower/low volumes.