Should a stereo soundstage be 3D or 2D?


I read several people talking about a “3D” soundstage. The main purpose of stereo is to provide left-right separation between different sounds in a recording (a “wide” soundstage). I understand that when properly set up, there is also front-back separation (a “deep” soundstage). So there are certainly two dimensions. Where is the third? Will a stereo system provide up-down separation as well? What is the technical explanation?

Thanks for the help!
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Showing 1 response by rodman99999

The best way to test your system, for accurate (faithful to whatever’s on your media, at least) sound stage reproduction: https://www.audiocheck.net/audiotests_ledr.php                             Also available, on the following Chesky CD, along with a number of other tests(ie: stage depth, Wood Effect/reverse polarity, etc): https://www.amazon.com/Chesky-Records-Sampler-Audiophile-Compact/dp/B000003GF3    (No doubt, that CD could be found for less, elsewhere)                                        More info, regarding the LEDR test: https://www.stereophile.com/features/772/index.html