That may not matter with my recommendation, as it's been similar for the past, almost 20 years. One of, if not the Best sounding electronics I've heard, is the Gryphon. It is a completely transformative amp, in that it doesn't sound like 'solid state' or 'tubes'. It is akin to music. Music so well reproduced that it becomes almost invisible. Character is on the dark side of perfectly neutral. I've compared it to the Fabulous Rowland Research, lesser McIntosh, CJ, KRELL, Plinius, Ayre, yada yada, yada. I have an ongoing love affair with this product. Now, having said that I've to heard the Audio GD Master. I hope you'll enjoy whatever you purchase. Music is too important to be dissatisfied with one's purchase. Good listening.
Larry