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Need Help! My Class A Amp Is Running Very Hot

Hi, currently I own a Luxman 590 Class A 30watts Integrated. After the unit running for more than half an hour if I put my hands on the top of the cabinet over or around the vents  it is burning hot , I even feel the heat on the sides of the cabinet, other than that the amp sounds good. Can anyone tell me if that’s normal or I should get it check out?
Thank you  in advance for your advice.
khmyjy

Showing 8 responses by erik_squires

erik_squires
15,861 posts
 
DID YOU TRY DISCONNECTING YOUR SPEAKERS??
erik_squires
15,861 posts
 
Oh!

Also, if you have a "separate" switch, use that, see if the power drops for any of these examples.

:)
Best,
Erik
erik_squires
15,861 posts
 
At idle, the Watt meters are pretty accurate.

As I said above, it could be you have a signal you cannot hear, so it is important to try disconnecting the speakers. If you have an A/B switch that would work.

So would switching inputs to an unused input. 
Best,
Erik
erik_squires
15,861 posts
 
As I noted, disconnect the speakers, and all inputs, and measure again.

If it's still 330, and you are sure you are running a US model, contact the manufacturer.

They are pretty responsive.
erik_squires
15,861 posts
 
Yeah, running a 100V model at 120V will absolutely cause this problem!
erik_squires
15,861 posts
 
http://www.luxman.com/
I don't know why peeps don't rely on manufacturer's websites. :)

Per this, it should be ~ 260 at idle, and ~ 330 at full power.

Disconnect all inputs, and outputs.  You may have some ultrasonic oscillations going on. 
If that does not drop the power, contact the manufacturer.

Best,
Erik

erik_squires
15,861 posts
 
This is a funny amp, @pbnaudio


Look at the power rating, and look at the idle/max wattage.
Tell me what they say to you. :)
erik_squires
15,861 posts
 
You can check this with an inexpensive watt meter:

https://amzn.to/2nhr6Iv


Set it to watts and compare to your spec.
And yeah, class A gets very hot.
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