Pure Class A amps above 100 Watts?

Sorry Mitch you been had, this is A/B what you think is Class-A.

"Class A Operation / Fully Balanced / XLR Inputs Only"

This is not an indication of 300w Class-A.

"300 Watts continuous rms into 8 ohms"

This is an indication of rms watts Class-A/B

"Power Consumption: Low Bias Mode - 300 Watts"

This is the "power consumption", not the Class-A bias

"Power Consumption: High Bias Mode - 800 Watts"

This again is the "power consumption", not the Class-A bias

If this amp had the Class-A bias you think it has it would be the size of a house!!

Here is an example of what heat sinks are needed to have just a 25w Class-A mono block amps with nothing over 25w (no Class-B at all) if it were say 50w of A/B the "heatsink area" for the same 25w of Class-A would more than double.
They are the famous 25w Class-A Mark Levinson ML2 monoblocks, but that’s all they had 25w!!!!
https://ibb.co/d6zvmMR

Cheers George

Indeed, since the low bias setting still provides class A operation up to 200 watts, you should hear little difference between the settings most of the time. For the absolute highest quality reproduction of dynamic material and the most critical listening, the amplifiers should be set to the high bias level for full class A operation.

Nobody but you George has ever questioned that these operate in Class A - as indicated in the mfg’s statement above.  However, your unsolicited challenge doesn’t really matter after all the positive reports/reviews of these amplifiers.  Have you ever heard a pair? BTW, the Lamm M1.2 Reference amps (also Class A) I owned at the same time as my M300s had similar heat sinking to the ML amps in your picture and although the Lamms were quite good, my musical preference was for the Clayton’s, so I sold the Lamms.

As good as those ML2s were in their day, a new Pass XA25 has a similar performance without the need to use that much iron. But that aside, I find the 800 watt power consumption and 300 wpc Class A a bit inconsistent unless the design is similar to the Krell so called sliding bias or something along those lines. Otherwise, something more like ~2500+ watts is more realistic which I believe is the point George is trying to make.

I find the 800 watt power consumption and 300 wpc Class A a bit inconsistent unless the design is similar to the Krell so called sliding bias or something along those lines. Otherwise, something more like ~2500+ watts is more realistic which I believe is the point George is trying to make.

I hear you (and George) on that point and cannot really speak to the designer's choices and specs except to say, they are what they are.  I do understand the amp is a dual differential design where the MLs and Krells may not have been, if that makes a difference.  I am not going to disagree with or argue the technical points but will say the amps do sound good, and particularly for the cost.

Nobody but you George has ever questioned that these operate in Class A

It's a play on words.
 " 300 Watts continuous rms into 8 ohms in Class A
   600 Watts continuous rms into 4 ohms in Class A"  

If this above is to be believed as your are believing, it would be worded like this instead.

"300w pure Class-A into 8ohms
 600w pure Class-A into 4ohms"

but will say the amps do sound good, and particularly for the cost.

I'm not saying they sound anything but good.
 I'm disputing how they advertise the Class-A ability of them, especially with no fans and top mounted flat heatsinks like that, there is no convection cooling at all, they'd be lucky to be 50w Class-A

Cheers George