In 1992, these values of 25 test subjects (students) in the Teldec control room (B & W
Matrix™ 801 Series 3) were determined with test signals of speech, and a Beethoven
string quartet, so without the usual higher-frequency unmusical clicks. There was also
found the little known effect of left localisation shift (left-hand twist stereo hearing).
The "stereo base" is the loudspeaker base in stereo reproduction, that is the image width between two speakers in stereo configuration, when the listener is ideally located in a corner of the stereo equilateral triangle.
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