unbeatable Class A integrated

You can find the gryphon diablo 300 used for that price.

Great amp the Gryphon, will drive anything and does give a taste of Class-A sound, but it’s an entree and not the main meal like 30w> Class-A could give.
When you hear something like the Gryphon Antillion Evo switched between it’s low 25w, medium 50w, and high 150w Class-A modes you know.

The Diablo 300 it’s said is around 10w of Class-A. And it has far more heatsinking than the Lux 590axII has.
And they run HOT!!
https://www.monoandstereo.com/2016/04/gryphon-diablo-300-integrated-amplifier.html say

Cheers George

The Gryphon Diablo 300 should be excellent at its asking price. What is the current retail price of the amp? The last time I checked it is around $16,000 to $17,000 for the basic model. The Luxman L-590AXII is around $9,000 only.

The Luxman L-590AXII represents great value for money. It is able to drive difficult loads with its conservative power ratings and in Class A adds a slight advantage over Class AB types. The only cons are the heat it produces and weight, although most quality amps in similar class are usually huge and heavy.

“Things don’t add up with the Lux Class-A figure presented or the Class-B wattage. “

Hold on. Two independent professional reviews (see links provided above) each benchtested the L-590axii at 90w or higher into 8 ohms and nearly doubling that two four ohms. 

Any credible disagreement with those findings must do more than the hand waving you are doing, George. 

If you continue to dispute the detailed findings in those tests, at least post a link to a credible review that shows contrary bench test results. Ie, link to a credible bench test that shows the 590 unable to produce 90w into 8 ohm.

No I’m not disputing the reviews by two different reviewers on different systems.

As for the specs (not full tests as Stereophile do) they don’t prove the amps are not cast from the same mold, but for differing rail voltage, wattage output and bias settings.

Fact is any tech will tell you these amps "look" to be the same, save for the different secondary transformer voltage and bias they would have.
I understand this is a bit of a pill for owners or retail sellers to swallow, but there it is.

590
https://cdn.shopify.com/s/files/1/1040/6126/products/luxman-l-590axii-integrated-amplifier-luxman-2_714x700.jpg?v=1574670463

509
http://www.luxman.com/asset/product/L-509X/gb3.jpg

Cheers George

What’s a bit of a pill is listening to people’s opinions and theories about things they’ve seen pictures of. That’s a bit of a pill.
And by the way, George, the 509X came about after the 590. The fact that they ’look the same’ has zero bearing on the engineering or design of the L-590AX. Point us to some links of all the burned up/failed Luxmans, you know, the ones that you're convinced can't possibly operate properly for any length of time. Gotta be all over the web, don't ya think. Last word is yours, not wasting my time with another ounce of your drivel.
Cheers,