See my reply to similar question on General.

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

In Reply to: Low noise filter for cable box audio posted by fin1bxn@msn.com on February 20, 2006 at 16:16:08:

Take the digital cable off the box. If the hum goes away, it is caused by a ground loop between the AC power safety earth and your cable entry safety earth connections.
There are transformers made specifically to fix this problem.
Links are in my post on General.

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Topic - Low noise filter for cable box audio - fin1bxn@msn.com 16:16:08 02/20/06 (2)

See my reply to similar question on General. - Al Sekela 12:18:40 02/21/06 (0)

Re: Low noise filter for cable box audio - Tweekeng 16:56:30 02/20/06 (1)

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See my reply to similar question on General. - Al Sekela 12:18:40 02/21/06 (0)

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