Ayon vs. Mastersound vs. Vaic Tube SET


What is the relationship between Mastersound, Ayon, Vaic? Seems they've been using those names interchangeably. 

Also, I heard that Mastersound amps are notoriously unreliable because they create so much heat it causes the components to fail. Do they really have inherent design flaws? Also heard that their factory support is so poor which is why they're not well distributed in North America. I know there is only one dealer in Texas. 

If one is to acquire a mastersound amp, would there be any support in East cost NYC area? 
Does anyone know how the Evolution 845/ PF100 / Compact 845 from circa 2010-2013 different from Most recent model? Have they improved reliability ? 

Which Tube amps rival Mastersound ? 
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Showing 1 response by prosoundman

I traded a Bryston 14 B2 and BP-20 for Mastersound PL-5 and two Mastersound 300B mono blocks plus a smidge of cash.  The Mastersound outperformed the Bryston in all categories save maximum volume.  I've run this combo for over 3 years now without incident and it powers my NOLA Metro Golds to very satisfying and delightful levels.  I don't understand why Mastersound gets poor reliability reviews as they are extremely well-built and seemingly very dependable.  Perhaps due to their size and weight owners are over-driving them expecting more than the rated 30 watts, Class A.

     J.