I received 3 private messages. There also were a few posts in answer to my post but they seemed like guesses.
DC Offset Blocker/Killer - where to buy in the USA
That was done professionally by an electrician who installed two isolated 20 amp outlets, two 20 amp circuit breakers, two copper polls for grounding for each outlet, each outlet has its own neutral and power line. After all this done the buzzing sound was still there.
I was then told to buy a power conditioner which I did (Audio Quest Niagara) which was like $4000 and that did not help. Called back McIntosh and was told that I might have DC offset in my AC line and was told by McIntosh that I would need a DC Offset Blocker/Killer to which when I asked them where to buy one they told me to go on the internet and search to find one, to which I cannot find one.
This bothers me a little bit, if you as a company think that I have dc in my ac and i need a dc blocker wouldn't you need to sell one as well. I brought this amp to my friends house and it was the same no improvement, so my guess is that he has dc in the ac line as well.
So If anyone of you knows where to buy a DC Offset Blocker/killer please let me know, but even if this helps kill the buzzing wouldn't you guys think that this expensive somewhat hifi amp/brand should be silent from the factory. I mean this is two units in a row all purchased brand new.
My house is 5 years old, everything is brand new, the whole neighborhood is about 8-9 years old, my electrician says that I have perfect power coming to the house and everything looks fine.
Thank You
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@jea48 I am in the USA I will talk to the electrician when he comes back from vacation to find out what exactly he did, I may say things that are misunderstood since I am no electrician by any means, but for what I know is that I have an isolated 20 amp outlet that has it's own grounding and that's pretty much all I know and I know that there is a copper poll in the ground by the outside electrical wiring. I can tell you more once I talk to him. |
You got a bit of bad advice. Mechanical transformer hum comes from having DC on the AC line. Isolated lines or ground do not help you. First check your AC for DC. An electrician should do this.This can be caused by lights and dimmers elsewhere in the home, so you may diagnose this by shutting off everything but your amp. Fixes include: - Switching to other phase - Using a balanced power conditioner. Most power conditioners are not balanced so won’t help. Best, E |
@erik_squires But what makes one transformer to buzz but another not. Wouldn't you think that when you spend this kind of money for an amp to be quite even if there is a little DC offset in the AC line, plus there was another guy that said there is no such thing as DC in AC line, so which advice should I go for. Even my electrician was confused as to what I was trying to fix, and when I told him how much money I paid for the amp he was laughing his arse off. He was trying to make me happy and do whatever I asked him to do even though he did not wanna do anything because everything looked fine to begin with. |
@ tomiiv30 As for DC on the AC mains. Nelson Passhttps://www.diyaudio.com/forums/solid-state/2080-dc-filter.html Re: Not trying to start a flame but....http://db.audioasylum.com/mhtml/m.html?forum=tweaks&n=140383&highlight=integrator+djk&r=... JMHO, if the mechanical buzzing on one of the transformers is caused by DC on the AC mains, then both transformers would be buzzing. . |
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