Agree with Newbee. Check out the Cardas site. Use simple (one/few performers, acoustic instruments, NOT multitracked heavily mixed rock), analog recordings (NOT digital) for optimizing. A good starting point for your speakers should be between 5'-9" and 7'-8" from the wall behind the speakers. Try to have as much room between the speakers as possible leaving a few feet on either sides (your room is narrow). Using a string make sure the distance from both speaker to your listening position is equal. Do not toe-in the speakers initially. Simply start at one distance from the back wall and move them 1" at a time until you have optimised the location. Once there, use smaller increments. Use minimal toe-in until the image "snaps" into focus. Always try one position and compare the sound with the previous position. Listen to the "accuracy" of the bass, naturalness of vocals, and other instruments.
This is a long, tedius process and can take several months to get right. Enjoy.
This is a long, tedius process and can take several months to get right. Enjoy.