What solution do folks use for the dreaded BFD hum? - Page 23 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #221 of 330 Old 02-05-10, 01:19 PM
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Re: What solution do folks use for the dreaded BFD hum?

has anybody used the Behringer HD400?
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post #222 of 330 Old 03-02-10, 05:51 PM
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Re: What solution do folks use for the dreaded BFD hum?

I have a terrible ground loop hum in my system. I tried an Art Cleanbox II but it dropped the sub output by several dbs so I made the conclusion that was not a very transparent method and decided to go another route. I thought converting the unbalanced signal from my receiver to balanced was supposed to get rid of it, so i put a Samson S-convert between the receiver and BFD and that made the hum worse. It amplified everything including the hum, not to mention there is always a hum even when my receiver is off because the S-convert is powered. Any thoughts would be appreciated.
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post #223 of 330 Old 03-02-10, 06:24 PM
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Re: What solution do folks use for the dreaded BFD hum?


Lots of remedies discussed and recommend on this thread. Have you tried any of them?

Regards,
Wayne



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post #224 of 330 Old 03-02-10, 06:39 PM
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Re: What solution do folks use for the dreaded BFD hum?

yes, both the art cleanbox and the s-convert.

I can't find where the ground loop is originating from I've tried disconnecting the satellite cable etc. If converting the unbalanced signal to balanced with an S-convert doesn't remedy it should I bother modifying the XLR cable?
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post #225 of 330 Old 03-02-10, 06:52 PM
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Re: What solution do folks use for the dreaded BFD hum?

I would - completely eliminated my problem
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post #226 of 330 Old 03-02-10, 07:03 PM
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Re: What solution do folks use for the dreaded BFD hum?

I might as well try it. I'm running rca from the receiver to rca into the Samson, xlr from the samson to xlr into the bfd, trs out of the bfd to xlr into the subs. Which one of these balanced ends should I mod? does it matter?
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post #227 of 330 Old 03-02-10, 07:28 PM
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Re: What solution do folks use for the dreaded BFD hum?


The XLR mods are for unbalanced connections, not balanced. Ditch the Samson and modify an RCA to XLR or 1/4" TRS. I'd do both ins and outs, or at least the ins for sure.

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post #228 of 330 Old 03-02-10, 07:48 PM
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Re: What solution do folks use for the dreaded BFD hum?

the rca to trs cables that phantom cables built me have an unbalanced 1/4 connection so I can't modify the cable into the bfd. Would it be effective to remove the sheild connection from the balanced trs 1/4 out from the bfd?
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post #229 of 330 Old 03-02-10, 08:12 PM
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Re: What solution do folks use for the dreaded BFD hum?


Can't hurt to try.

Regards,
Wayne



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post #230 of 330 Old 03-02-10, 09:27 PM
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Re: What solution do folks use for the dreaded BFD hum?

unsoldered the sleeve of the out trs and that didn't help
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