in engineering circles, there is no mention of testing for 'sound stage'
I'm telling you that your wrong. A speaker designed purely on anechoic chamber measurements is just as likely to sound bad as it is good. In order to guarantee a good sounding speaker, you MUST actually listen to it. You have to put the machines down for a minute and actually listen to the sound it produces. Same goes for everything else in audio.
I'm done with this crap.