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
Hmmm....I have no issues with a topic I brought up with respect to a GaN-based class D audio amp. 

I did start a new thread the other day about impedance matching in the preamp-power amp topic. 


Guys, I don't understand why always in forums like this new things, technologies got trashed and blamed just because only a few people had the chance to really experience these new things and only a few people know how good they really are.
The topic of this thread is "There are new GaN based Class D amps out there, has anyone listen to it or even own one of it?". I want to stick to topic and want to add: I'm using the AGDs Vivace GaNTubes together with a Mark Levinson No.28 Pre (yes it's an old one but still in very good shape compared to many others) and it works perfectly together. At least from what I can hear :). I would be interested to hear from other people experiences from listening sessions against other power amps maybe...I'm not interested in discussion whether or not they are worth the money. This question has everyone to decide by themselves... as always. Either you drive in a Porsche from A to B or in VW Golf, both bringing you to the finish but with the Porsche it's a lot more fun :)
Cheers,Mallard


Hi,

 

The topic of this thread is  "Anyone listened to or own any of these amps"

 

We have done direct A/B testing between the Merrill 116 Elements and the AGDs Vivace GaNTubes. Truthfully these amplifiers are night and day differences. We tested both these amplifiers and several other class D amplifiers in 6 very good systems. We have not finished all our testing as of today but I can tell you that class D can either sound world class or very average. We have concluded that GaN can also sound world class or very average. We did not test the Technics SE-R1. We did not do any bench testing and all 6 systems are very different with only 1 common factor, the cabling.

 

Cheers,