Speakers for Atma Sphere M60 mk3

I drive Coincident Super Victory II speakers in a similar sized room with the M-60 and they do not break a sweat.  The most important thing with the M-60s is a high impedance speaker that presents a benign load.  My speakers are really 12 Ohm that drop down to a minimum of 8, and are 91.5 dB efficient.  I think you could easily drive a speaker that is 89-90 db efficient IF the impedance curve is favorable.   AudioKinesis speakers are built with Atma-Sphere amps in mind, so they are ideal.  But there are lot of other good choices mentioned above.  Just watch that impedance!

Save $ and get better performance-Atma-Sphere Class Ds ($5400).

More transparent, detailed wt much better bass. 
I had M-60s. The new Atma Ds beat them by a wide margin.

One of the best amps I have heard.

Ralph actually recommends the Ds over any of his tube amps. He listens to the Ds exclusively. 

A friend runs his M60s with 93db, easily loading Silverline LaFolias and they sound great together. As others have said, a friendly impedance curve is quite important. Any >90db efficiency speaker that is mostly 8ohms or close will pair well.

IMHE, the Spletz Zeros add an audible whitish haze that detracts. I think that approach is like shoe-horning size 11 feet into size 10 shoes. After a while, it don't feel right! Cheers,

Spencer

@sbank

+1

OP: FYI, I have a LSA Voyager GaN 350 (solid state) that has exceptional sound and is very affordable. Ric Schultz modifies them to take them to another level.

I have Emerald Physics 3.4s which are Open Baffle with 12" concentric drivers and one inch polyester tweeters. Super easy load. If you’re patient you can get a great deal on this brand (there are a number of similar models- a couple which incorporate 15" woofers) all of which are no longer made. See my Virtual System for pic

Many people including myself use Atma-Sphere with Merlin speakers.  A match made in heaven, imo.