Before we were born my dad was radio announcer on Oahu. Here is a quote when I asked him about it.
KLEI First THEN KZOO THEN KLEI FULL TIME, THEN KGU. Many of my voiced commercials recorded at KGU where aired on many other stations. KGU management use my recorded voice as a policy and as a come on to ad agency’s; that it had the professional quality talent voices. At times I made 8 or more taped dubs for an ad agency. So you could dial in Kumu, Kpoi, Kgmb, etc.and hear my voice. I heard that some of my voiced commercials even played on Maui stations and some outer islands stations. At times my voice was used exclusively for certain business, I.e. Union 76 Gas. His Radio nam was Tracy Trace.
Here is a news clipping from