Speaker Positioning

millercarbon is right, but for kicks and giggles. I want to add:  Not all rooms are symmetric in design or furnishings.  A little compensation can be added, for example, for a big Sofa on one side of the room, a large mirror or door, etc.  Listen!

The Wilson set up method (referred to in a previous response) is very good - we did mine using a laser range finder to arrange equal angles to each speaker and then calibrate the cant angle of the upper module (mid/highs) which is finely adjustable with my Wilsons. After all that I intentionally moved my listening chair around (after marking the original position) and wa interested to find that yes, as little as 6" shift was easily detectable by ear.

The Wilson method presupposes that having the speakers angled so as to point right at you is the way to go (I have no doubt that it is, for the Wilsons) but some speakers I have owned worked best pointing along the long room axis rather than at the listener, so preliminary experimentation by ear is called for if your speaker manufacturer gives you no guidelines.

RE: Speaker Positioning:

Hi - Speaker positioning is critical to achieving the best sound possible. Actually, there is such an instrument that can tell you if your speakers are placed correctly and/or in the best space possible. It's called your ears. And if you cannot tell the difference, have an audiophile buddy come over to give you a hand (and an ear!).  

I agree with the statement above. You used your ears to select the type of speakers you purchased, why stop there. Just take your time positioning your speakers for the best possible sound, patience will have its rewards.

A tip if you have a symmetric room and are trying to get the speakers in the same spot with same toe-in.  Cut 3 boards or dowels.  On that is the distance from the front wall to the rear corner of the speaker.  One that is the distance from the side wall to the rear spike and one that is the distance from the side wall to the front spike.  You can then use these three to set the other speaker in the exact position relative to the front and side wall and the toe-in will be the exact same.  Again, this is only relevant if you have a symmetric room.