Gallium Nitride GaN Class D Amplifiers


In my recent research for a possible upgrade to my current amp (Benchmark (AHB2) I was reading about the new higher end design for Class D. I'm very interested in learning more about these new GaN(Gallium Nitride) designs. Three companies are offering some very well reviewed products and they are not going crazy with Watts per channel:

Orchard Audio offers a 250 watt Amp

AGD a 100 watt

Atmos-Phere also a 100 watt

What's interesting  is while Orchard is a new company AGD and Atmos-Phere have been around a while producing high end Tube amps. In almost every review it is noted how these newer designs sound like Class A or Tubes with all the benefits of Solid State. One reviewer couldn't go back to his tube amps after extended listening to the Orchard. No wonder AGD and Atmos-Phere are getting into this technology. It's very exciting as these amps are highly efficient turning over 90% of the power they draw into sound compared to about 78% with A/B designs and I believe even significantly lower for Class A. They run cool and usually weigh between 10-28lbs. I plan to do more investigation. Small size and light weight with decent power is very attractive. There are also mono block offerings for more power if needed. These are not cheap Class D products. They are well designed and constructed.

Orchard Audio's base model is around $2700and their Dual mono version with larger power supplies is $5500.

Both AGD and Atoms-Phere are $5000

Mono blocks for each are about twice the cost.

Has anyone had any experience, demos, etc ., with these types of GaN Class D amps?

 

jfrmusic

Showing 6 responses by audio_is_subjective64

Gold Note of Italy has GaN mono blocks also that are quite spectacular and have sound quality that rivals the boutique builders and will save you $1 to 3k. PA-10s are well reviewed and received. Search the pages in this forum. 

AGD does not make a Hybrid Tube GaN amplifier. The GaN circuits are located in the tube and it is 100% solid state GaN, pure gimmickry with some functionality.

@marco1 I suspect there are other synergy issues. I rather enjoy my GaN amplifiers, I do not put them in the same category as my tube amps I do think they are very close. Love the detail. YMMV and I only have OCC copper IC's and speaker cables in the GaN system. 

@marco1 Sure I get it. It did not work for you, however many others rave about them. Many people say the same about Class D and G (Benchmark) amplifiers I rather enjoyed my BC e1x (daughter hijacked it). It just wasn't for you. Having Cardas Clear makes nothing fool proof. I enjoy my tube system also.

Therefore what I perceive as a lack of soul, I can only attribute to the change from tube to Class D amps.