question for Luxman L-590AX owners

My dealer and Luxman said that. My dealer emailed them and the chief engineer said because they are class A they buzz when in idle.

seriously? omg you have got to be kidding me

maybe they need to hire nelson pass on a contract engineering assignment LOL

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

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.

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.

@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