What solution do folks use for the dreaded BFD hum? - Home Theater Forum and Systems - HomeTheaterShack.com

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post #1 of 324 Old 09-27-06, 03:51 PM Thread Starter
Mitch
 
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What solution do folks use for the dreaded BFD hum?

I'm a big believer in standing on the shoulders of giants.
In this case that means I would like to know what solution folks use for addressing The Hum.

Right now I'm using a cheater plug, but I would like to solve the problem the right way. I saw the links to Jensen and Ebtech stuff, but Jensen has a bunch of different products, and the Ebtech links are qualified with words like "possible."

So, what are you audio giants using to address The Hum?

Thanks,


Mitch
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post #2 of 324 Old 09-27-06, 06:38 PM
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Re: What solution do folks use for the dreaded BFD hum?

The right way is to convert the balanced connections on the BFD to unbalanced that are required by most AV systems using a transformer. You can get them at radio shack for about $14. Using the cheater plug is OK for testing and may never cause a problem, but why not do it right?

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post #3 of 324 Old 09-27-06, 10:01 PM
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Re: What solution do folks use for the dreaded BFD hum?

this worked great for me, whisper quiet. The cheater plug was definitely louder. It also got a good review at secrets.

http://www.dcispec.com/
post #4 of 324 Old 09-28-06, 01:08 AM
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Re: What solution do folks use for the dreaded BFD hum?

I use a cleanbox II.

http://www.musiciansfriend.com/produ...4&src=3SOSWXXA
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post #5 of 324 Old 09-28-06, 01:12 AM
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Re: What solution do folks use for the dreaded BFD hum?

I use the ART CleanBoxII

http://www.audiomidi.com/CleanBox-II-P4657.aspx

Worked like a charm.

"Relax. Don't worry. Have a Homebrew."
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post #6 of 324 Old 09-28-06, 01:15 AM
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Re: What solution do folks use for the dreaded BFD hum?

Great minds think alike

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post #7 of 324 Old 09-28-06, 01:44 AM
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Re: What solution do folks use for the dreaded BFD hum?

I've never heard of this problem before, my BFD doesn't hum, then again im in Australia on 240v, not sure if that has anything to do with it or not.

I've had a look at the links posted in this thread, could one of those be used to eliminate the ground loop caused by a laptop on mains power?


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post #8 of 324 Old 09-28-06, 06:40 AM
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Re: What solution do folks use for the dreaded BFD hum?

Quote:
could one of those be used to eliminate the ground loop caused by a laptop on mains power?
Most likely, if it's in the audio chain.


Quote:
I would like to know what solution folks use for addressing The Hum
In the BFD GUIDE, under the first section "Connecting The BFD", it discusses the solutions to this problem, including several of the products already mentioned. Some use transformers, some differential amps - take your pick... The DC1 that stitz mentioned seems to be a good price and get good reviews. I've never tried it myself.

You want to stay away from inexpensive devices for this application, since their low frequency response are quite poor. The Radio Shack product is particularily bad in this regard.

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post #9 of 324 Old 09-28-06, 07:41 AM Thread Starter
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Re: What solution do folks use for the dreaded BFD hum?

Just so people don't think I'm a complete idiot, I did see the suggestions in the BFD guide, but there appear to be a hundred Jensen products and the other products are listed in the guide as "possible solutions."
Hence, I wanted to hear some first hand accounts of what people are using.



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post #10 of 324 Old 09-28-06, 12:50 PM
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Re: What solution do folks use for the dreaded BFD hum?

Has anyone tried the HumX? Not having to insert something in the signal path would be prefered.
http://www.ebtechaudio.com/humxdes.html
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