2. amps-preamps
  3. 184615-182267

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

Showing 1 response by avanti1960

avanti1960
1,405 posts
 

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.  

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