Questions re:  GaNfet technology vs other designs.

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@hgeifman 
Why not audition one in your system to see if you they float your boat or better than your current amplifier or Integrated. I have heard AGD Vivace Mono’s and they sounded nothing like conventional class d amplifiers. Amazing transparency, detail and gut wrenching bass.

For me, class A with high efficiency speakers is the ticket to audio nirvana :-)

This is a very difficult question to answer. You are comparing brands (Hypex, Purifi) with a technology (GaNfet).  A technology has no sound per se. Each implementation has to stand on its own merit. Orchard Audio may sound very different than Atma-sphere. Hope that helps. 

GanFet, Class d, Purifi, Class A, High Bias Class A/B, tube, ZOTL, AHB2 THX...a lot like the colors of automobiles....there are favorites like white and grey but there is someone for every color.  And, what looks good to you this year may not be so appealing next year.

When it comes to audio gear, you can read the reviews but until you try it in your system in your room with your music...there is no way to know whether you will be moved to the point of saying..."I gotta have this".

@spenav - Perfect answer. GaN is just a component technology. Throwing it into a flawed design is not going to fix the flaws.