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Class D amps that are superior to all or most?

Recently, I have heard about some Class D amps that may be close to the best there is regardless of class. Certainly, this technology has been in development for decades. The main issue has always been the switching power supply. In this regard, I have taken notice of AGD. They have created a whole new power supply that “switches” at a frequency 100 times the normal silicon based MOSFET. The designer uses a gallium nitride based PS. Interesting, it is enclosed in the KT88 glass envelope that sits on top of his amps. I am aware of two more pricey amps that seem to be also at the top- the Solution and the Merrill. There must be others that compete for the title. After my thread, “Is there a SS amp that can satisfy a SET guy?”, I am still on the quest.
Don’t want to spend $50K!
mglik
jjss49's avatar
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jjss49
6,612 posts
 
@atmasphere

when are you releasing your class d amps, ralph...?

surely many devotees here want to hear what the longstanding otl tube amp legend here with almost 10,000 forum posts believes sound right with class d modules in tow !!!
achipo
58 posts
 
I picked up a Wyred4Sound Class D amp several years ago to fill in while my M60s were back at Ralph's for refurbishment.  I was quite impressed with the sound, and this was a $1k amp, so I'm listening when Ralph says he can build a great amp with the technology in the $5k price point.  Heck even those AGD GaN "tube" amps at $32k look interesting.  I'd like to give them a listen.  (Plus they look cool!)
ricevs
1,543 posts
 
AGD GaN amps are not $32K. The Audion’s are $7500 a pair and the more powerful Gran Vivace’s are $18.5K a pair.

Also coming out this summer is a new Manhattan amp from Mytek....200 watts a channel dual mono stereo GaN based for $7K......The $20K 500 watt a channel Mytek GaN Empire mono blocks will be released in July. Lot’s of cool class D coming soon.
atmasphere's avatar
atmasphere
11,861 posts
 
when are you releasing your class d amps, ralph...?
@jjss49 We've run into covid-related issues with part availability. We've completed the AC line-related measurements (the concern is meeting EU directives so it can bear the CE mark; if it does this it will meet radiation directives pretty much world-wide); right now we're working on the RFI measurements. The plan is to have the first production occurring this summer.
markw1951
51 posts
 
I just got rid of my class D amp (Chinese Icepower).  I liked the sound but I am a ham radio operator who just got back into it after a break and the amp was radiating RFI (radio frequency noise) from the speaker cables.  I did what I could to filter it out but nothing worked.  Back to class a/b and I like it too so nothing lost. 
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