Benchmark AHB2 or Class D (GaN FET)


The Benchmark AHB2 seems to be a different twist on linear Class AB amplifier design.  This amp uses a different approach to distortion cancellation that gets around some of the problems of using large amounts of negative feedback.  It uses a THX patented technology (under license) called AAA.  This amp has been around for several years. It gets rave reviews, so I am surprised that the technology is not in more widespread use.

I am interested in why this approach is not more widely used.

Also, how would this amplifier compare to the newest Class D technology, which uses GaN FETs and much higher switching frequencies.  (GaN Class D amplifiers which are price-competitive with the AHB2 are the LSA Voyager and Peachtree).  

At a higher price point would be Atma-Sphere Class D monoblocks and the AGD Tempo.

I would appreciate hearing the forum members' opinions on the AHB2 technology vs the latest Class D amps.

 

Thanks,

hifinut51

I had a set of Benchmark run in mono configuration.  I simply could not get them to sound great in my system and had to sell them.  

They had a predominant midrange forward character where the midrange was so much louder than other frequencies.  It was clear and dynamic, almost too dynamic.   I too have 90db sensitive floorstanders like you and cannot recommend the Benchmarks.  

I have an Orchard Audio Starkrimson on order as part of the tour and am looking forward to it.  

In the mean time a Parasound a21+ is sounding pretty decent.  

Here you go @ricevs ​​​​@nonoise . Almost every review mentions it so they must know more than us and GN is simply play their cards close to their chest?

I do know this they sound great and better than most if not all the Class D that I have listened to. 

https://positive-feedback.com/reviews/hardware-reviews/gold-note-pa-10-amplifiers/

https://www.hifipig.com/gold-note-pa-10-power-amplifier/

https://darko.audio/2020/07/brawn-and-brains-gold-notes-pa-10-power-amplifier/

Found another guys where the gents at 6 moons did speak to the designer.

Page 2 they confirm GaN being used in the PA-10 and that it is not Class D. 
Enjoy.

https://6moons.com/audioreview_articles/goldnote13/2/

That's the same one I linked to in my post. Like the article quotes, the PA-10 is the only one to use them.

All the best,
Nonoise

@nonoise yes, and I was also addressing @ricevs comment. Gold Note also makes Tube Amplifiers and like other fine Italian marquis they perform and look the part IMHO.  If you have a chance to listen to the complete line they will not disappoint in regards to integrated amplifiers, stereo amplifiers and mono-blocks.