GaN-based Class D power amps


The use of GaN-based power transistor tech is now emerging for Class D audio power amplifiers. Seems appropriate to devote a forum thread to this topic. At least 3 companies have commercial class D amps in their books:

Merrill Audio, with their model Element 118 ($36k per monoblock, 400 W into 8 ohms, 800W into 4 ohms), Element 116 ($22k per monoblock, 300 W into 8 ohms, 600W into 4 ohms) and Element 114 (coming soon). 
https://merrillaudio.net

Review of Element 118 at this link:
http://www.enjoythemusic.com/superioraudio/equipment/1018/Merrill_Audio_Element_118_Monoblock_Amplif...

ADG Productions, with their Vivace Class D amp ($15k per monoblock pair, 100W into 4 ohms). (The designer emailed me indicating he has another product in the pipeline.)
http://agdproduction.com
Review of the Vivace Class D moniblocks at this link (warning: link might not work (1/11/2019)):
https://positive-feedback.com/reviews/hardware-reviews/agd-production-vivace-gantube-monoblock-ampli...

Technics SE-R1 Class D stereo amp ($17k per stereo amp, 150WPC into 8 ohms, 300WPC into 4 ohms) 
https://www.technics.com/us/products/r1/se-r1.html
Preliminary review of the Technics SE-R1 at this link:
https://www.stereophile.com/content/technics-se-r1-digital-amplifier
Technics also has a lower priced GaN-based class D integrated amp in their catalog:
https://www.technics.com/us/products/grand-class/stereo-integrated-amplifier-su-g700.html

Anyone listened to or own any of these amps?


celander
Our reference amps are Mola Mola Kaluga’s, designed by Bruno Putzeys. They have been in a different class compared to other class D and A/B designs we have tried. We also know somebody who had a very expensive (£50k)class A design from Switzerland who moved them on for the Kaluga’s (£10k).

Just because another amplifier is based on the same NC1200 module, won’t necessarily mean it will sound the same.

Demos available in the U.K. if interested.

How can we know how it compares if the "review" has no comparisons?....no mention of what amp he replaced or what other amps he has heard in his system. All we know is that his sound has improved. Maybe a $2000 amp from another company would also improve his sound.

It seems that some audiophiles are very "delicate" people. They don’t want to upset anyone by saying anything negative about some product. I mean, this is all very, very serious, we don’t want to make anyone "feel bad".....do we? Are we really this wimpy?!? If you really care for people then you want them to know all the information they can get so they can make the best purchases. If they bought yesterdays toy and you tell them it is not todays toy.....well that is just the way it is (or at least what you hear, in the here and now). There has never been a product that has remained state of the art......except maybe the Ionovac tweeter. Reviews without comparisons are worthless!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

The $8000 a pair mono blocks from Nuprime would be a nice comparison......their latest generation of patented Class D with 700K switching and all discrete front end with 1meg input impedance.......for 36% of the price of the Merrill.  He could have borrowed them from a dealer and we would know if these "GaN" amps are really better.....and if they are better, is it worth the money difference?

ric, yes! 

Now that I have my IC and coax and gone back to a WW Series 7 Eclipse PC (MSRP $300) I am truly amazed at the music that was hidden away in my Audio Alchemy stereo amp & dac/pre. So much better even in the bass, that I shut down my 2 SVS Ultra subs. And I finally scored a A PS 5 power supply for the dac/pre, but also got a heck of a deal on PS Audio 700s + stellar gaincell dac/pre. Who will win out? Time will tell
Ricevs, Did you even read his OP?

He said, “I have had the Merrill Audio Veritas since January 2014 and have definitely enjoyed owning them.”

So the reader is led to believe all of his comments about the Element 116 is in reference to the Veritas he used previously.