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?
I have both a LSA Voyager 350 GaN amp and a EVS 1200 IcePower 1200AS1s. Both are dual mono in a single chassis. Both are excellent, and as good as any of the many amps I owned over the decades be they tube or SS. Sadly, the EVS is no longer made, but the Voyager is and it's a real bargain (MSRP ~$2700), AND, Ric Schultz modifies them HTH |
I owned the AGD Gran Vivace and they were spectacular. I had an Aesthetix Calypso linestage (tube) preamp in the chain and it was the best sound I've had in my room to date, save for one aspect - low end (reverb). Back to this in a second... what set AGD apart from the others is that they purchased all of the GaN modules that were designed for audio applications whereas all others only had access to modules for other purposes. I do not know if this has changed, but it seemed to be a true story a year or so ago. Back to where GaN fell short for me - Enya "O Come, O Come, Emmanuel" - Opening deep synthesizer and second, John Rutter: "Pie Jesu" around the 1:02 minute mark. Both are Qobuz. What is missing? Power and emotion. My question is, why? I do not think other amps are embellishing the sense of power and scale. I am wondering what it means that GaN is not accomplishing the same? Is it more accurate? Controlling the drivers too well? |
