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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
clearthink
1,421 posts
 

tomiiv30"Moderators: What’s going on with you deleting my posts, in what way or form have I spammed or offended someone on this forum"

That is what is so strange, odd, and unusual about the US you claim "First Amendmant Rights" but then when someone posts something accurate, truthful, and honest they're posts are deleted because some is offended, insulted, or hurt? It is time for the members here to state, declare, and demand that Free Speech be Permitted in This Group At All Times and I again 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! Only a brave person such as yourself dare risk the onslaught of attacks, criticism, and vile characterizations you have suffered, endured, and tolerated all in the hope, expectation, and wish that others be shielded, protected, and defended against the sort of injustice, maltreatment, and abuse heaped upon you hear by those with alternative motives, goals, and designs!
tomiiv30 OP
65 posts
 
@clearthink

Thank You

miner42
709 posts
 
Instead of sending to McIntosh, send to another authorized service location that does not have a vested interest - Like Audio Classics.  Their service is top rated.
tomiiv30 OP
65 posts
 
@miner42 

And who's gonna pay for it?
jay23
210 posts
 
Did you ever try a power conditioner or DC blocker after not using the improperly grounded outlet?

McIntosh should be more helpful. At the same time, it wouldn't make sense to put a DC blocker in all its products to make a small percentage happy. DC blockers are colored and roll off the highs. Why would audiophiles want a manufacturer to make their gear colored in an unintentioned way, when the customers with problems will benefit from cleaning up their power? The amplifier working at the dealer shows it's not broken.
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