New Spatial Audio M4 Ultra

It looks like the M4 Ultra replaced the M4 Sapphire and the M3 Sapphire seems to be on hold pending tweeter availability or retooling with a different tweeter. The new M4 ultra is so new I doubt any have been shipped yet. 

Clayton has said the silk dome tweeter will cross at 800 hz on the Ultra vs the 576 hz cross on the Sapphire. 

If you read Ron from New Record Day’s review… he loved the M3 Sapphires… pretty much giving them his best of the best comments. 
 

If you read all of the X reviews… same type of comments. 
 

And now the Ultras are getting similar accolades… Clayton is on a roll.