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Just bought one of these guys, and it's able to stream 1080p video across my house, but now there's a soft buzzing noise coming from my speakers. I'm guessing it's interference from my powerlines? The picture OTOH looks to be perfect quality.

How do I fix it? Is it a faulty device? Do I need to run it through a power cleaner? Is it unavoidable?

One outlet is attached to one of the adapters and nothing else, the other one shares an outlet with my TV.

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The fault is not in the Ethernet part of the path (and not in the part where ethernet is carried over powerline conductors) but most likely improper earthing of the audio section.

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Oh good! I'm glad to hear this. They're cheap speakers anyway, but I haven't noticed any problems like this with them before. I'll see if I can ground them or get some new speakers. – Mark Sep 1 '11 at 15:34
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Keep in mind that the data coming over the ethernet (powerline or otherwise) is digital and packetized and as such is impervious to picking up powerline buzz. Powerline issues could cause problems, but they would be connectivity issues. The data either comes though unchanged or you don't get data.

You need to look elsewhere for the cause of the buzz

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Awesome! Thanks for this info. Glad it's not a problem with this crazy ethernet-over-power technology. – Mark Sep 1 '11 at 15:35
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