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question for Luxman L-590AX owners

I own the subject amp, have had it for 3-4 years. I recently noticed a low hum or buzz coming from the amp itself (not the speakers), and would swear that it has been dead quiet up until now. You have to have your head right down beside it to hear it. I'd like to hear what other owners have to say. Are your amps completely quiet? Seems like I may have developed an issue. Thanks in advance, and Merry Christmas.
builder3
builder3 OP
765 posts
 
I'd be interested in hearing your thoughts, jjss49.
ryder
1,690 posts
 
No buzz with my L-590AXII. Something is wrong with the unit or the mains power supply if there's a buzzing sound from the amp.
kren0006
1,859 posts
 
From the posts on this thread and the other one linked to above it appears it is an issue that tends to develop after years.

I took a look at the Luxman class A release history to try to guess when the new versions of class A integrateds might be released, in hopes that perhaps this issue gets addressed. But if the issue goes back to past generations, who knows if having such hope for correction is even warranted??

Anyway, near as I can tell:

L590A was released in 2005
L590Aii was released in 2010
L590AX was released in 2013
L590AXii was released in 2016

Would seem that a new release should be soon if past is prologue, given that we are now into 2021.
jjss49's avatar
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jjss49
6,612 posts
 
@builder3 

I'd be interested in hearing your thoughts, jjss49.


i don't know what to say really...  saying class a amplification is an unavoidable factor in creating transformer hum is a new one to me, and i think it is a pitiful and lame excuse - i have had class a amps from pass and others they do not hum - and it has been a few years since i have had a luxman amp in house

hum can be caused by low line voltage as others have mentioned... maybe check your line voltage?  

otherwise, if you can try to see if the retaining bolt(s) to the major transformers in the unit are as tight as possible... sometimes with age, transport, movement, they can loosen...

good luck
kren0006
1,859 posts
 
Yeah, no kidding. Seems like a solvable problem to say the least. C’mon Luxman, figure it out!

That’s why I really wish I knew how prevalent it was. 5% of units? 20%? 50%?

Helpful if others who have the units and have never had any buzz/hum issue post up as well. Maybe it is a very small minority? Fact that some users who've had multiple generations and all hummed could mean more widespread, or could me line issues if all happened in same house, or combo of both.  But if Luxman dealers actually admitting it is an issue, then that is more telling.  Dunno
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