I recently had some in wall speakers installed for my home theater setup. They are buzzing quite a bit now. It looks like the cause is the lights we have in the ceiling of the room with the speakers and the one next to it. They are just standard R30 flood lights. But most of the ones you can buy now are the "high efficiency" ones that seem to induce a lot more noise. Is there anything you can do to shield the speakers from the noise? The noise happens even when I unplug the power strip that powers all the electronic components, so I don't think that they are the cause of the noise.