I know, kren, hard to keep everything straight, lol.
I read about the DC line blocker a bit, sounds like a coin toss. If the transformer has an issue, it's not going to magically eliminate the problem.
I'm not looking for Luxman to come clean on what they know, or don't know, I'd just like a reply on having it repaired. Or, for that matter, a response of any kind.
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Thanks, jjss49, I think I'll give that a try.
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One problem for me, like any other internet forum, is evaluating the answers that are offered. If it was my area of expertise, that would be great, but it's not. Are there differences in the design requirements for transformers between Class A, AB, etc. Is the heat of the Class A an issue? Are there other differences? I'm talking amps with similar output, of course.
Thanks
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Hey, guys, thanks to you all for taking the time to help. Your answers give me some food for thought. We have one dimmer in the house, on a light that's seldom used, I don't think that could be it. Two things come to mind, after reading your replies. Number one, we have a lot of Christmas lights and decorations up at the moments, all indoors, most of it on timers, and controlled electronically, etc. Not sure if they are causing any issues, but they'll be gone within the week, so maybe I'll see a change. The second change is my wireless router. It's the same one for a few years, but I recently made some alterations, at the advice of the phone tech. Almost everything was hard wired, and I was having service issues. He told me the hardwiring was actually causing interference with the signal, and advised me to unhook everything and let it operate wirelessly (less the TV that's 3 rooms away). This was counterintuitive to me, and I was skeptical, but everything was definitely improved after I unhooked the cabling. My first step is wait and see if there's an improvement after the Christmas lights go away.
wahoostewjr, I would like to say I'm positive I never had the hum before, but can't. It's that quiet. It sounds exactly like the low hum in my heater/thermostat combo down in my shop. Nearly unnoticeable, unless there's not a lick of noise anyplace, and you listen very closely. My amp also runs pretty warm. From comments here about other pieces of equipment, sounds like some other stuff runs a lot hotter.
Thanks again!
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Now I can reasonably say my amp didn't originally have a hum. The original owner stated as much in the above link in twoleftears post.
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I don't have any hum through my speakers, gryphongryph. The piece you linked may be great, but the idea of buying something from halfway around the world for $1000 and seeing if it makes things better isn't overly attractive to me. When my car has an issue, I don't just start replacing parts at random. There has to be a method to the madness, at least for me.
L.
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Thanks, guys. Essentially, it's a near non-issue for me, other than the fact that I'm quite sure it never was there before. I'll do some more reading.
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Nothing here is about the L-509X, which is an entirely different piece.
I own the L-590AX. There's no version that was ever called a MkI, throwing weird names in the mix won't help clarify anything.
On a side note, I'm inclined to think that your amp shutting down is indicative of a problem that needs addressed. Do you have plenty of room around the amp? They need to have good ventilation.
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kren, I went and dug up the original receipt for my amp. I'm the 3rd owner, but I have the paperwork. My amp is 5½ years old, and I'm pretty sure this just started. You'd have to hear it for yourself, but I can only hear it with my ear down next to the unit when I turn it on. Still irks me a bit, since it used to not be there. On the newer MkII, who knows? Maybe in 5 years, it may show up in some pieces, I don't know. Personally, if I auditioned the piece and liked it, I wouldn't let it be a deal breaker. Hope this helps.
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Wow, I'm an idiot, lol. Hadn't read that entire thread that twoleftears linked, just did look at everything, the last post on it was mine from two years ago, good grief.
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Yuck it up, erik. Mine had zero buzzing as well, until about 2 months ago, lol.
Btw, if anyone is interested in complete dead silence, all you need to do is email Luxman USA. Kind of a joke.
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I might have to live with it, I guess. I was considering buying the new AXMarkII, sounds like that would just be a very expensive crapshoot. I don't think it has a thing to do with any outside factor. I think it's the transformer. I can't hear mine unless I stick my head right beside it.
I emailed LuxmanUSA probably 3 weeks ago. Actually went through their page to request information on a repair. Crickets. Hey, if your customers are a bother, just ignore them, they'll go away.
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Even though I used the same word, it's not really a buzz. It's a hum that I have to be within a foot to hear, and have nothing playing. Still bothers me though, the idea that it's not dead quiet.
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I was the same, until a couple months ago. I'd like to have the newer AXII, even though I choke at the money, but a couple guys here say theirs have the same hum. I bought this amp used, it's immaculate, think it was $4300. Not sure what I'm going to do, it's eating at me, lol. Might be nice to hear something from Luxman, too, obviously.
Thanks to everyone for the input.
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I'll add this post, for anyone that's interested.
This afternoon I disconnected everything from the amp, my intent being to test it on another circuit. First, I took it downstairs and plugged it in there, mostly because it was on the way to where I was going. No change, still a low hum.
After that, I lugged the thing down to my shop. It's a modern building, 70 years newer than the home, and on a parallel drop with our home service. After the meter, the house and shop are two separate feeds. I shut off every breaker in the shop, other than one 20A circuit that the outlet was on. No lighting, no heat, etc. The amp still had the same hum. I'm not an electrical engineer, so I'm unsure as to how flawed this test might be. Obviously, it eliminates everything in my home. It seems to me that all it really leaves is the initial service from the power company, and the amp itself. I'm still thinking the transformer in the amp.
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snapoli, thanks. I've came to the same conclusion, although certainly nothing that I can prove. Mine's quiet enough that I can't hear it from a couple feet away, and certainly not when there's music playing. It still peeves me, because it's a recent thing with it.
Appreciate everyone's input, thanks.
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I'd be interested in hearing your thoughts, jjss49.
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Lot of this has been covered. This exact integrated amp has been dead quiet since I've owned it, which has been 3-4 years, up until a couple of months ago, when the hum started. It's been plugged into the same outlet since day one. I just now checked the voltage at the wall, 121.2-121.6VAC. Tested several other outlets in the house, all in the 120-121V range. The panel is 10 years old, professionally installed. The PUD service drop is new, although the line feeding that is pre-existing. Same with my shop, with the exception that I wired it. Same service drop to parallel feeds into a 400A meter base, one set of feeds serve the house, the other set serve my shop. The amp has been powered up in both buildings with no difference, so unless the power company has a new issue, I'm ruling out our power.
I'm leaning heavily towards an issue with the transformer in the amp itself, or so it seems to me.
I'd feel more comfortable taking it apart if I could find a service manual.
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