Have you got a spare pair of Speakers?
Here is an idea..
Enhanced Stereo Speaker system (Poor mans Quadraphonic or Surround Sound)
At home I use four speakers for my Hi Fi (or Stereo) using this simple set up Diagram shown below, I have found it enhances a stereo set up with actual seperation between all speakers. I found using larger speakers for the back pair works better and also depends on speaker impeadance. It is credited to someone called Hafler and called the "Hafler Hook up", If you have an extra set of speakers....give it a try!