I've never heard a reading of "close the blast doors" that really sounded like I remember it from 1977. It doesn't have that same stormtrooper "sound" that "open the blast doors" has. I remember those two lines always got a laugh in the theater because their delivery was so similar.
But memory may be playing tricks on me.
The mono dub of Beru is a revelation. I'll never be able to listen to any other ever again.