I'm not all in on digital systems because I'm not all in on DACs

From what I can see, Technics is using a PWM output with feed-forward built into the DSP engine.

Maybe there is feedback on the output as well, but I haven’t heard anything about that portion.

A real shame that after all that work it doesn't actually measure a lot better.

That link helps a lot in understanding what Technics is using. In all of their descriptions, they (naturally) stop short of giving it all away. 

If I remember correctly, there is feedback on the output but it's only the negative feedback that's used after summing everything up. I'm probably wrong but I'm going by my memory. 

The retailer that I have it on order from said from what he can figure out, no one is doing it the way Technics is right now. There are a lot of ways of skinning the digital cat and some are similar, but not the same.

Here's one review of the SU-R100 that may shed more light. 

In fact, here's the passage about there being no DAC conversion being done: 

It’s also worth pointing out that there’s no DAC, no digital to analog conversion, taking place inside the SU-R1000. Incoming digital signals are upsampled (to 32-bit/768kHz), sent through a 1-bit Delta-Sigma converter, followed by another stage, the PWM converter, which forms a so-called “ternary” (2-bit) signal out of the 1.5MHz 1-bit signal. So each transistor only has to handle a switching speed of 768kHz/1-bit which is easier to handle in terms of the natural response time of a GaN-FET. I include this information knowing full well that few people will really understand it, yours truly included, so let’s just say that digital remains digital right up to the speaker binding posts.

Now I'm more confused but still eager to get the Technics.

All the best,
Nonoise

The more I think about it, is it that the GaN-FETs are fast enough to handle the halved digital signal whereas a traditional MOSFET or JFET can't so with the latter, a DAC is necessary whereas with the GaN-FET, it's not?

All the best,
Nonoise

It’s also worth pointing out that there’s no DAC, no digital to analog conversion, taking place inside the SU-R1000. Incoming digital signals are upsampled

Ok, now they are really splitting hairs.

1 - This applies only to incoming digital signals.

2 - The output stage IS a DAC.

I think the reviewer is talking about the ADC which upsamples all signals whether they are analog or digital. It's what I've read on every review of it so far.

All the best,
Nonoise