Luxman Class A Integrated Slight Buzzing Noise

Deedo: I understand and agree with your points above. My suggestions above were the only things I could think of that might help solve the hum problem. However, the fact that your Luxman 590AX can be heard up to "8 feet away" is, in my opinion, a very "serious problem".

If my Luxman 590ax hummed (like yours does) so that I could hear it 8 feet away, I would return the unit to my dealer and buy another amplifier (not Luxman). Based on your 590ax humming problems, maybe your Luxman 590ax needs to be returned for repairs. What is your dealer saying? Can you return the unit to your dealer and buy something else?

I have owned other high end equipment before that, unfortunately, had problems that I could not live with. In all cases, I returned the unit to my dealer and bought something else.

As a happy owner of a Luxman 590ax, that does not hum, it really bothers me that your 590ax hums. If my 590ax had a hum (like yours), I would return it and buy something else.

I would also call Philip O'Hanlon and discuss the humming issue with him. Based on this tread, it seems other 590ax units also have a hum. A solution is required (repair or return).

When my Ayre QB-9 DSD DAC stopped working, I immediately returned it to dealer who shipped it to Ayre for repairs (bad board to board connector).

Deedo: I just noticed you purchased the 590ax from another Audiogon member. Did the 590ax hum for this person?

No I didn't but Dave who started this thread bought his 550AX from another Agon member. My 590AX was brand new so it requires running in, possibly the buzz will soften as the amplifier plays in i.e. the transformer laminates will physically settle in due to the oscillation? there is no mention of this in the manual though, but hopefully this does happen.

No I didn't but Dave who started this thread bought his 550AX from another Agon member. My 590AX was brand new so it requires running in, possibly the buzz will soften as the amplifier plays in i.e. the transformer laminates will physically settle in due to the oscillation? there is no mention of this in the manual though, but hopefully this does happen.

Sounds like a DC offset on your power line. This article/review should be very informative. http://www.pooraudiophile.com/2015/03/how-to-fix-dc-offset-and-transformer.html?view=magazine Don't bother following the wikihow link in the article. It is about DC offset in an amps output which is an entirely different thing.