I purchased my promedia 2.1 speakers back in march and they got here last week and it all seemed to be going well until i noticed yesterday that they were emitting a low humming sound. Now today i was faced with a new problem when i was testing out the headpone jack on the right speaker when i took it out the right channel stopped working but the humming sound still comes from both speakers. Now the only speaker that technically works is the left one.