Have to agree with the majority posting a response here on this topic!
I have the Legacy Calibre XD speakers... and... they are superb in all respects - very few others sound as good - as is true of any of the Legacy speakers when properly set up. All of their speakers sound very similar to each other - depending upon the space they reside in.
They are Open Baffle Hybrids - which have great imaging and soundstage, as well as deep bass, which is refined, "true bass," not bloated "hip hop" bass!
And Legacy Audio (Bill Dudleston and team) is the epitome of class in their customer service! As the founder and designer of all the Legacy equipment, he rivals the engineering / design skills of Siegfried Linkwitz - with his speaker designs. He’s a brilliant engineer and applies that skill in all his designs.
I followed the Aeris development for years, and finally bought a pair about 4 years ago, directly from the factory in Springfield for use in my new Lake House in IL, while it was under construction. They stored them for me, until it was completed. But, when it was completed, I found that they were too large for the space I had available and I realized they were likely too big and heavy to be practical in my application. After 2 years of storage, they readily allowed me to cancel my order and replace the Aeris with the Calibre stand-mount units, which sound virtually the same in my space.
I’m very happy with the "Aeris minis," which sound very much like the Aeris I bought, initially, which I can easily move about as necessary.
"Audiotroy" is correct - they are very efficient - which permits you many more options in electronics (including lower powered tube amps) - especially, if you get the XD version. And... if you get the "Wavelet" you can tune them to sound great in whatever space you have them.
"Just my 600,000+ cents!"