Need Help! My Class A Amp Is Running Very Hot

The L-590AX is spec’d as consuming 220 watts at idle (310 watts max). The L-590AXII is spec’d as consuming 260 watts at idle (330 watts max). Both models weigh about 63 pounds. The amp’s heatsinks are entirely enclosed within its metal cabinet, and are immediately adjacent to the side-panels, as can be seen here: 

http://www.luxman.com/asset/product/L-590AXII/gb4.jpg 

So the escape route for the heat corresponding to those power consumption numbers is almost entirely via the vents on the top, supplemented to a small extent by radiation through the side panels.

Given all of that it seems to me to be very possible that what you have described is normal, but it’s hard to say for sure. Perhaps another owner of one of these models will chime in.

@three_easy_payments, I believe the OP’s reference to "cabinet" pertained to the metal enclosure of the amp itself.

Regards,
-- Al

Hi there, the cabinet on the top temperature is 28C which I think is just a little warm but acceptable but when I put my hand on top of the plastic vents (over the heat shrinks) it is extremely hot, way over my thermometer maximum temperature of 50C 

Questions: How much SPACE is open above the amplifier? How much space is under the amplifier? How much space is open behind and to the sides of the amplifier. Is it on the floor, on carpet? Is in on a hard shelf?     
Ambient temps? This is how HOT is your ROOM? If you live in the tropics or like me, regularly are at 80F/ 27C or higher, then the amp will be hotter. just the way it goes... If you room is at 74F / 23C that is not an issue.   
Does the 'too hot' mean if you left you fingers on it for thirty seconds you would have a second degree burn? Or just a bit of pain??    
If just some pain. then I say it is NOT too hot.     
I own a PREAMP that is a blast furnace. It gets really hot. I spoke to the guy who built them, and he said, normal.  
Things you can do: Raise it up a little higher off the shelf or floor. So small bits of wood under the feet. 1/2inch .. 10 to 15 mm is all you need. If the amp is on a shelt, it needs at least three or four inches free space above it. If it has less, you need to solve the lack of free space above it.    
All the "Danger Will Robinson Danger" nonsense spouted in other folks posts means nothing if the amp is designed to run that hot.

 Thanks for the feedback, to answer your questions, the Amp is placed on a  open wood shelf, the top and the sides are wide open, the room temperature is about 70 degrees. I can put my hands on the cabinet for a period of time no issue but when I put my hand on the vents it is very hot can’t hold it for 30seconds I will get burn

Read the paragraph under ’PROTECTION CIRCUIT’, on Page 1 of the Luxman AX590 manual: https://onahighernote.com/oahn/wp-content/uploads/2015/01/L590AX.pdfLuxman probably knows, how hot is too hot, for their product and have taken precautions.

Thanks for the info, it is very informative 
so many nice and helpful people here, love this site.

Thanks I just bought the Killawatt and plug the L590 to measure, the reading is fluctuate between 332W to 340W 
I assume is within specs?

Hi I checked the reading it is about 332 Watts at idling with no volume and the same with music on

Thanks for the feedback 
I just did another reading from the Killawatt
Standby =1.1W
Idling power on with no input =318W
With input and music playing =326W
60Hz Volt 122

The back panel of the amp stated it is a 115 Volt /60Hz model

Yes I did, please  see the above reading 

Thanks for the clarification hififan.
Currently I have the 590AII model so I guess it is running within spec
I had the 550AX before it doesn’t run as hot but the 590 sounds a lot better more dynamic and detailed 
Happy Thanksgiving!

Chill off rod man
First time I experienced with class A Amp 
just want to be sure it’s ok since it is a preowned unit