Speaker Positioning


I know from speaker position is critical in achieving the best results from a given system. Is there a dynamic way to measure placement of each speaker to make certain they are the exact same distances from back/side wall, cabinets, seating, etc. beyond a measuring tape and listening to the results? Seems to me if minor differences pay large returns, you could be tinkering with this a long time.  Thanks for the indulgence.  
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Short answer: no. Long answer: Because no such thing can be made to work.  

Speaker placement involves a lot of compromises that only you the listener can make. No dynamic AI or whatever is ever going to know exactly what you like. So sorry, but no way of getting around it, you're just going to have to work through it like everyone else.  

The most efficient setup technique I know is the one I have used for like 30+ years. First move the speakers around and listen from different places, listening only for tone and frequency response. Try and find the most even frequency response. If using subs (highly recommended) then forget low bass and pay attention only to the lower midrange on up. Don't spend a lot of time fussing with precision, doesn't hardly matter if the speakers are pointed perfectly or equidistant at all, you're not listening for that, only frequency response. Be sure to move the listening chair around because where you sit has as much effect as where the speakers sit.

Now with the speakers and chair pretty much where you want them take out that tape measure and make sure they are absolutely perfectly equidistant and toed exactly the same. Listen for imaging solidity and stage width and depth. Next toe the speakers in just slightly more. Then toe them out just slightly more. Notice when toed in more the image is more solid, and the sage deep. Toed out the stage is a bit wider and not quite as deep or solid. There is no right or wrong. Its what you like.

When you get what you like you are done. No stupid software. No dopey hardware. Just you, your brain, and your ears. You can be done in an hour. Or devote your life to it. Spoiler alert: devote your life to it and some day you find it doesn't even take an hour.
Dynamic meaning changing / constantly changing? You could put the speakers on wheels until you get it into the exact position you want, and then either lock the wheels or replace them with spikes in hopes you don't move the speaker too much during the replacement process. Using a laser measure would be more convenient and probably more accurate than using a tape measure.
My oppinion on this is to get it close but don’t loose sleep over 1/8 of an inch.  I also think that sometimes its better to not have them at the same exact distancE from the walls because of frequencies cancelling each other out.  Also, your room is probably not perfectly square.  I like to do what MC says but then use a string japed to where your head is then pull the string tight to one tweeter.  Hold that position on the string now walk over to the other speaker and make it the same distance.  
Distance to speakers and equal angles to the speakers is more important than equal distance to walls.

Shoot, speakers are going to have sliggt differences between the drivers and crossover components.

I’ve been using Sonarworks reference 4 correction software and my speakers measured slightly different between the 2 channels.  I was within + or - 3 db the whole range but with correction on, the image is perfectly centered and the frequency is flatter.  Im not certain the cost sonically speaking though of using this program.  A bit too early to tell if its something I will use all the time, part of the time or none.