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

Showing 6 responses by douglas_schroeder

My review of the Legacy Audio i.V4 Ultra Amplifier is now published at Dagogo.com 

 
ricevs, I checked with Legacy, and you are correct; the amp is not differential, but the bridged modules when run mono are. I have revised the article accordingly, and it will appear revised on the website.

The channels are not using only one half of a stereo module, but are bridged. 

As regards your claims of performance with your mods, a couple thoughts. I review retail products, not much in terms of mods. So, I recuse myself from it.

In addition, and there is nothing personal in this at all, unless you have a proper business and discuss what precisely you do in your mods, I would not recommend anyone send off equipment to such entities. I deal with people who make claims on equipment every week, and I have learned personally and professionally that the modded gear has no advantage over any other given stock retail gear. YMMV   :) 






Ric, I really appreciate your last post! Cleeds’ post enlightened me to the fact that I did not see the disclosure of "ricevs", as I am not familiar with your company. I removed my two previous posts, as I now consider them unproductive to continued discourse.

I also want the truth, which is what I was probing for in those posts. I do not have the topological answers you seek; you would need to discuss with Legacy Audio.

I mean no offense when I state that no one can tell whether a modded component from any modder would sound better than any given stock component from another manufacturer. I do understand you comment about all components being modded. I have compared a fair number of tweaked/modded products, and I have found no direct correlation between modding being universally superior to any other given stock component. That is why I state one simply has to make comparison. Others may have different experience, but that has been my experience.

In reply to your comment, "What I do is not financially viable to run a company," you are not alone. I have heard similar several times from other manufacturers.
The i.V Ultra series of amps from Legacy Audio are not stock IcePower modules in a box. That discussion needs to be discarded. I have not shared everything I know about the design. I am not interested in sharing it all, as well.

Further, I presume that Legacy’s use of one channel with a dedicated power supply per channel could outperform all the mods of the EVS amp. Or, vice versa. 

Obviously, no one - including EVS, Legacy, or myself - knows short of an actual comparison.

Actually, I should add to my last comment. A simple comparison is not terribly informative. A comparison between amps in use with 4-6 speaker systems, and from 12-18 discrete systems yields an entirely different assessment (perhaps consistent with first impression, perhaps not) than simply use in one system with one pair of speakers. 

Short of such a thorough familiarization with an amp, the judgment of which is better is quite limited. That is why in my review I built more than a dozen discrete rigs with several pairs of speakers, my methodology. I pay no attention to what many think is SO important, break in. I build systems - and get a far better, global understanding of the performance of any component.  :)