@georgehifi So far as I can make out no-one is being a detractor. Just simply stating fact.
Your original thread included a link to Amirm's review. He does not attack it either; instead as I have pointed out, substantiated the idea that its excellent for its intended purpose, which is to demo and evaluate what the GaNFETs are capable of. This isn't a bad thing. Its simply a thing.
As the unit sits, if you were to drive Alexia's with it I think you might be surprised how well it could do with that load until its SMPS limits its current. A set of heatsinks could fix that. Here's the manual: https://gansystems.com/wp-content/uploads/2020/03/GaN-Systems-Class-D-Amplifier-and-SMPS-EVB-User-Gu...It suggests that the amp can support 400 watts/4 ohms if heatsinks are employed. But in the little time I had to peruse the manual I didn't find how they suggest the heatsinks be applied. The point I'm making here is that since this amp employs GaNFET output devices, its output impedance will be only a few milliohms even in the zero feedback mode. This will mean that as long as the amp is not being overloaded, it will behave as a voltage source into the 0.9 ohms of the Alexia. I'm not saying it will play to full power- that will depend on heatsinks and the power supply used (which won't be the one in the kit).
That 0.9 ohm load only shows at a very narrow range of frequencies in the Alexia, so I really doubt its a problem. Wilson themselves claim its not, so to maintain your position you'll be up against them.
Your original thread included a link to Amirm's review. He does not attack it either; instead as I have pointed out, substantiated the idea that its excellent for its intended purpose, which is to demo and evaluate what the GaNFETs are capable of. This isn't a bad thing. Its simply a thing.
As the unit sits, if you were to drive Alexia's with it I think you might be surprised how well it could do with that load until its SMPS limits its current. A set of heatsinks could fix that. Here's the manual: https://gansystems.com/wp-content/uploads/2020/03/GaN-Systems-Class-D-Amplifier-and-SMPS-EVB-User-Gu...It suggests that the amp can support 400 watts/4 ohms if heatsinks are employed. But in the little time I had to peruse the manual I didn't find how they suggest the heatsinks be applied. The point I'm making here is that since this amp employs GaNFET output devices, its output impedance will be only a few milliohms even in the zero feedback mode. This will mean that as long as the amp is not being overloaded, it will behave as a voltage source into the 0.9 ohms of the Alexia. I'm not saying it will play to full power- that will depend on heatsinks and the power supply used (which won't be the one in the kit).
That 0.9 ohm load only shows at a very narrow range of frequencies in the Alexia, so I really doubt its a problem. Wilson themselves claim its not, so to maintain your position you'll be up against them.