Which Class D Amplifier? PS Audio, Ghent, Nord, Merrill or other???

I’ve never heard one wanting a Class D amp simply for no reason other than wanting one. So it’s an odd sort of thread. Having said that, here is one that might tweak your fancy: AGD Vivace Monoblock Class D amps. http://agdproduction.com/

The class D AGD Vivace Monoblock amps are a steal at $15k USD per set. I have heard they are the real deal in rendering an authentic 3D soundstage of the correct timbre pace and dynamics.

Not that I understand everything said in this clip, it’s interesting to watch. 
https://youtu.be/g3-eKrltKkE

Looks like it has the GaN transistor-based class D tech, too. 

So George, I guess we can all consider you in the Class D camp?

@nordacoustics. I see you copied and pasted a customer review from your website into your post. Since this is easily viewed by a copied URL link, it would save everyone here time to simply read the first part of your post pertaining to your products and then allow them to decide whether they want to click on the URL link to read the customer review.  

I’ll consider your response promising. Maybe it’s time for a group hug with Eric?

Folks should remember to show respect to others. Calling out someone as a “troll” is not generally considered polite. 

It will be several years before this GaN class D audio amplifier IP technology becomes truly affordable. Several key patents have over a decade of life left on them. More competitors with GaN-based products entering the marketplace will be the best way to drive prices down. 

Noble100, both GaN Systems and EPC hold patents on the GaN transistor tech. 

Yes, personalities abound in these forum threads. And yes, folks have what one might call “signature statements” that amply showcase their strengths and faults. 

From what I can tell reading posts is that not a lot have actually personally heard this newer GaN-FET tech implemented into a class D audio amp design. So while the likes of AGD, Technics and Merrill might in principle sound terrific based upon this newer tech based upon the tech’s inherent theoretical advantages, they may also suck in real world implementation due to other designs flaws.

I’m not saying that they do suck and that the older MOS FET tech operating at lower switching frequencies are still king of the hill in class D land. But one ought to be careful in proclaiming one design implementation dead based upon merely theoretical considerations of a newer FET tech design. 

I’m fed up with the relentless attacks against George being posted on this thread. If members don’t stop the nonsense, then I hope the moderators shut down this thread. 

Erik, yes, I’m George. I will always be George, to the extent George is maligned here. 

At some point, folks need to be less critical of others with whom they disagree. Piling on with repeated posts is a form of abuse towards a member that the moderators regularly condemn and remedy by removing posts.

George has stated he has heard a variety of class D designs in a variety of threads. Maybe doing a small amount of research before posting questions about his not having done so is in order.

+1, george
-1, erik
+2, me

Certain users continue to pile on other members by essentially reposting attacks. This really needs to stop. If folks don’t stop engaging in this behavior, then the moderators will step in and delete the entire thread. I don’t really think the majority wants that to happen.

Members need only make their point once in a single post. Continually making the same critical point against a member in follow-on posts is abusive.

And to be clear, I’m the member who reported to the moderators that certain posts should be removed as being abusive to other members.

I own and love my Spectron Audio Digital One Class D amp. 

Ugh. You guys don’t learn. 

Erik, I earmarked your second to last post for review.

Erik, it’s clear you and George are antagonists. Why is it necessary to stir the pot in every thread? 

In THIS PARTICULAR THREAD, I see nothing but constructive input on George’s part. It’s the reactionary anti-George commentary that is front and center. 

Tossing arguably superior circuits or eval boards into a box will not likely make for a superior product providing a lasting satisfaction. Designers care about circuit board layout, trying to minimize circuit trace paths from RFI and noise perspectives. And then there are the vibration control and global noise/RFI isolation and reduction issues that come into play.

GaN-FET manufacturers will be important to the implementation of the GaN tech in Class D audio amplifiers. And yes, wide spread availability of the GaN-FET’s will be needed to drive costs down. But GaN-FET modules designed for Microwave and RF applications will not benefit HEA class D applications. Just saying...