There are devices designed to deal with it too such as - http://www.avahifi.com/index.php?option=com_content&view=article&id=270&Itemid=239 and http://www.amazon.com/dp/B0002E4YI8/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=321FECHQA1Z6W&coliid=I2I3VNO4OQRS43
I have the latter device as...