The Costco thing was unauthorized, and ML pulled the plug on that in a couple of days.
Unfortunately, anyone who bought those speakers did not get a factory warranty...
The Summits are the same efficiency as the Vantages (I believe...) I would say from
a lot of experience with ML over the years, the more power the better, but it depends
on your room size and how loud you like to listen.
I'm using mine with a CJ Premier 350 (350 per channel into 8 ohms) and the dynamics
are limitless. I used the Vantages with the McIntosh MC 275 and that was good, but a
warmer more organic sound. Getting a second 275 this week, so I'll give em a try
with two as monoblocks. They worked well with the Manley 250's as well. At low
volumes, they even did a great job with the Pass Labs F3, but not very loud.
I've noticed with mine, even though they aren't broken in yet, they will play way louder
than I need to listen to music.
Also, I listen to an extremely wide range of music: rock, classical, jazz, electronic, hip hop
you name it. I am EXTREMELY pleased with these speakers. I have probably owned
40-50 different GOOD speakers over the years and for me, these do exactly what I'd like
them to do, no complaints AT ALL. (that doesn't mean they'll be nirvana for you....)
They are accurate, dynamic and have plenty of resolution.
Definitely worth an audition if you like panels....
