3D imaging


I I started thinking about this yesterday. What makes speakers produce a 3D image? I figured the first thing is the recording itself. I'm guessing mic placement has a lot to do with this. Next I would imagine is room,and speaker placement. Downstream gear certainly has to have some effect on this. Does the crossover have something to do with providing this "illusion " for lack of a better term? 
     Now please understand,I don't have anywhere near the technical knowledge a lot of you folks have,so as you explain this phenomenon,please dumb it down for me! 
    Thanks in advance,
        Ray
128x128rocray
What makes speakers produce a 3D image is being symmetrically equidistant and pointed towards the listener. Period.

All the other stuff contributes, of course. But you asked specifically about speakers. 

But hey, don't take my word for it. Prove it to yourself. Point one speaker off to one side instead of at you. Move one a foot closer or further away. Notice nothing else changed- same recording, same room, same components.

Speakers are like real estate: location, location, location.
If you want to do some research, look into Head Related Transfer Functions.

For most speakers, having good room acoustics is key.
Thanks for the input millercarbon. I rotate 3 sets of speakers in my system,(Hornshoppe Great Horned Heils,Nola Boxer 2's,and Graham Chartwell LS3/5's). They all throw a great 3D image,so I guess I'm doing something right. I was just curious if the speaker design was responsible. 

 I've read posts on other forums where posters think that attaining 3D imaging is just chasing unicorns. Obviously they are doing something wrong. 
   
  As a side note,I've been at this hobby for a bit,and I'm no spring chicken. I just don't have a ton of technical knowledge. This is one reason I frequent this site. There are a large number of members here that DO have a vast knowledge of things audio. I find that exposing myself more to the technical aspect of this hobby will help me understand what I am hearing to a greater degree. 
    Again,thanks for your response,
           Ray
What makes speakers produce a 3D image is being symmetrically equidistant and pointed towards the listener. Period.



While precisely balanced speakers are important, not all speakers sound at their best this way. 

Quite frankly, some speakers sound better off-axis. A lot of high quality tweeters have resonances which you can tame by toeing the speakers out.  Further, if you have a very small room, sometimes crossing the speakers in front of your head reduces side reflections significantly and improves imaging.

Lastly, as some speaker developers have discovered, despite our best intentions, sometimes listening below the tweeter axis is also beneficial.

The final judge is your ears and your circumstances.


Best,
E