Thanks for your elucidation of some of what's involved with surface mount. I think a lot of people think that since we make tube gear by hand that somehow that means we don't have an education or something- or don't keep up with the times. We're using 603 components right now- as you point out, easy to do by hand. And probably too for production- depending entirely on volume of sales! On this basis, this statement:
it's impossible to create a "retail product" complete Class-D board, using all smd components, making it by hand soldering.
You say it can be done, but that would only be a 1 off prototype and not the production version.
-is simply false. Now at some point we may go to 402s just to reduce inductances and resulting ringing and radiation. But for now the 603s have worked out alright. If 'sales' translates to 100s of shipments, then its likely we will farm out the work.
it's impossible to create a "retail product" complete Class-D board, using all smd components, and making it by hand soldering
There appears to be a sleight of hand going on here, compare the above quote above to this one that appeared earlier:
To do that you need to buy either ready made boards then do simple mod
and call them your own, if not and you want to do your own GaN
Technology boards, you need the knowledge to design it from scratch, and
you need some serious automated wave soldering machines to do all those
smd parts that are involved, you can’t do it by hand.
When comparing these two, we see that George had to back off from the idea that 'to do all those
smd parts that are involved, you can’t do it by hand'; that's morphed into you just can't create a 'retail product' by hand soldering. Both statements are false. The soldering industry has all sorts of products designed for hand soldering work- and one of my employees worked doing production smd work all by hand.
Except for maybe a prototype, good luck hand soldering for retail
production a Class-D that’s all SMD components like this cheap $34
We're not planning to build a $34.00 amplifier and to be clear a $34.00 amp isn't going to have GaN FET output devices- such an amp would be all entirely on one chip. Its realistic to discount that comment as irrelevant.