I would encourge folks here to set aside those intangible metrices and focus / appreciate those valueable measurements what have already existed. Prior to Erin introducing Klippel’s Near-Field Scanner to this community, direct measures for soundstage were almost non-existant based on my limited knowledge (correct me if I am wrong pls). But looking at the plots he provides on horizontal and vertical polar SPL, we immediately see how wide and how tall the soundstage a particular speaker / driver could actually provide. The lateral and vertical dispersion (aka waterfall) plots might serve similar purpose but I got to admit that I was not able to comprehend and relate those to soundstage as easily as these global polar plots. Let us treasure what we have and worry less about those intangible ones. I will also be highly interested in how one could capitalize these to come up with a measure for the soundstage depth.
