Yes, these recordings sound like they were recorded on an old answering machine. That said, the enunciation is immaculate and the tempo is just slow enough to make out the individual sounds, yet fast enough to not sound forced. I'm certain that a skilled technician could remaster them.

And truth be told, I do prefer my audio samples to be in nonsterile environments, for the simple reason that we'll not be in such an environment when encountering real native speakers.