Most of Jack Wagner's Disney recordings were made at his own house where he had a recording studio (which was installed by Disney in the 1970s).
A voiceover booth in his home was connected to Studio D at Disneyland in Anaheim. At the time, Jack's home in Southern California was one of the first to use a direct audio link from a remote recording studio!
I would like to set the record straight on the voice. Throughout the 1970's and into the 1980's the voice heard on all Disney monorails, as well as most all the voiceover work for all the parks was the legendary "Voice of Disney", Jack Wagner.
I have had the privilege of working with him many times through the years.
One interesting side note is that Jack's home in Southern California was one of the first uses for a direct audio link from a remote recording studio. It was put in by Disney in the 70's and connected a voiceover booth in his home to Studio D at Disneyland in Anaheim. He frequently would receive last minute calls for special events and was able to just walk over to the booth and "beam" it directly to the park. Anyhow, with the amount of work that Florida was generating after Epcot and the Studios opened, plus the fact that Jack wanted to head towards retiring sometime, other voice talent was sought out locally in Florida.
There have been several people used in voiceover work since then, one of them being Kevin Miles, who is one of the original members of the Voices of Liberty at Epcot, and can still be heard there daily. Kevin recorded the monorail voiceovers after the Grand Floridian was built, and his voice was still there until the 25th Anniversary rolled around, when it was updated by one of the new voiceover talents.
The amount of voiceover work at the parks now is astronomical, and it is shared by a couple of people who have "the voice", including Kevin. Interestingly enough, though, Jack's voice can still be heard welcoming everyone to Orlando on the monorails at the airport terminals.