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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
atmasphere's avatar
atmasphere
12,404 posts
 
I said
To those who want to understand, why it’s better to turn off your amps, here it is simply as possible.
(as they like to be drained and recharged otherwise a false permanent "empty floor" happens and your electrolytic power supply caps won’t have the uF storage ability they once had when new
That is not what I was told by an engineer from Cornell Dublier. He told me that to get the longest life the cap should remain charged, and otherwise kept at a low temperature- heat kills electrolytics. If the cap is experiencing high ripple current, this will cause it to heat up a bit- so in such cases it will run longer if shut down and allowed to cool.

In the case of a class D amp, the ripple currents are quite low and the amp tends to operate at a low temperature, so leaving it on all the time is fine insofar as electrolytic capacitor life is concerned.
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ddgtt's avatar
ddgtt
103 posts
 

The finest amplifiers I've experienced, that utilize class-D circuitry, are clearly the Mola Mola. The Genesis of their amplifiers (and other components as well) resides with the engineer who created the UCD module and the N-Core module. Understanding the proper topology when using these modules is key to the overall performance of the amplifier in question. Over the years the engineering team at Mola Mola has continued to refine class-D technology. Consequently, the sonic performance of the Mola Mola products defies the assumed notions of class-D performance. Mola Mola's Kaluga mono block amplifiers started it all and now continues on with the Kula integrated amplifier, and their brand new Perca stereo amplifier. Whether it's about class-D, class-AB, or A, the Mola Mola amplifiers are simply fantastic and represent the very best for the money (and a lot more).  They are transparent, 3-dimensional, detailed, dynamic and oh so musically involving.  Mola Mola is where it's at. 

arafiq's avatar
arafiq
1,790 posts
 

IMO, Aavik class D amps (I own the Aavik U-280) are far superior to anything class D I've heard so far. I would have loved to compare it to the new Atmasphere class D amp but since I only have integrated amps, i.e. no preamp, there was no way for me to audition. But I've heard great things about Atmasphere and AGD amps as well. 

 

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