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DC Offset Blocker/Killer - where to buy in the USA

   I have McIntosh MC8207, the first unit I bought from an authorized dealer came with a loud buzzing coming from the left transformer, and was replaced with a new unit which came with even a louder buzzing. The buzzing can be heard from 8 feet away. Then I was told to have install new 20 amp outlet that has its own isolated grounding.
   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

tomiiv30
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almarg
9,670 posts
 
FWIW, my reading of the thread leaves me with essentially zero doubt that the OP is being entirely truthful.  And I agree with him that it is very likely that investing the time, physical effort, and money that would be involved in sending the amp to McIntosh would result in a finding that it is functioning as designed.

Regards,
-- Al 
clearthink
1,421 posts
 


jea48"Does that mean that you will stop posting to this thread?"

No he will not like an infected boil or bloody hemorroid cleeds will not go away he will continue to argue, interrupt, and "obfuscate" the legitimate, genuine, honest, discussions that occur on this board among and between dedicated, knowledgeable, forthright audiophiles seeking to share they’re experience, wisdom, and knowledge in a straightforward, valid, and reasoned approach, style, and manner.

Thank you, Al! PM sent to you directly!!!
tomiiv30 OP
65 posts
 
@almarg

Of course I am being truthful, If I was not McIntosh and the dealer would’ve been on my ass from the get go. They know who I am, I have spoke on the phone with Chuck twice and my dealer spoke to Ron on the phone few times but I was never given a clear answer as to why is this happening and if they are planning to do something to fix this problem.

Both me and the dealer were told by these two McIntosh representatives that I need a DC blocker and that I have bad electricity of dc offset on the mains even though McIntosh never sent no one to my house to check if I really have dc offset on my mains, they are just speculating, and even if I do have dc offset aren’t they suppose to help the consumer to come up with a solution, because I am not the only one with this kind of a problem. And since McIntosh has no smart answer they chose to stay quite as you can see.
clearthink
1,421 posts
 

tomiiv"f course I am being truthful, If I was not McIntosh and the dealer would've been on my ass from the get go."

You are damn right they would have been on you with lawyers invoking McIntosh's rights, credibility and intellectual property they would have lubed you up and rammed it to you if what you are saying is not the whole, complete, unadulterated, truth there is no doubt, question, or uncertainty hear as to you're claims, assertions, and statements with the single, sole, solitary, exception of "cleeds" who's oozing boil festers upon this group with repeated, predictable, and assured regularity, consistency, and frequency.
clearthink
1,421 posts
 
 
tomiiv30 "And since McIntosh has no smart answer they chose to stay quite as you can see."
I salute your perseverance, bravery, and valor in bringing this matter to the attention, awareness, and consiousness of this group you are to be congratulated, thanked, and applauded rather than doubted, questioned, and challenged! 
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