I assume that a feature like that would not have been consistent with Apple's desired image for the Macintosh. If you look at all their old ads, they touted it as a revolutionary computer for most business and personal needs, and obviously wanted to distance it from ubiquitous toys and trinkets. But I agree that would be awesome, especially if there was a set of decent stereo speakers inside - probably would have been a good idea for the Color Classic or LC5xx series.