I may be misremembering—I was a kid at the time—but I distinctly remember the "wow" effect only working if you were sitting in the driver's seat. To me that sug

I may be misremembering—I was a kid at the time—but I distinctly remember the "wow" effect only working if you were sitting in the driver's seat. To me that suggests that the signals were delayed to the nearer speakers to center the sound stage around the driver rather than some arbitrary point above the center console. But looking up photos online, I see the button I was talking about labeled as "Ambience", which kind of suggests the method you're describing. It also turns out that using the Internet to find technical info about a 40-year-old car that was never popular to begin with is very hard!