Integral to Mayer’s expansion was the construction of sound stages, which would support the advancements in synchronized sound film production. During an incredible three month period, August through October of 1929, Stages 3, 4, 5 and 6 were built incorporating the latest technology in sound engineering, said to be the closest to achieving absolute sound proofing by the industry at that time. Four hundred tons of steel and more than 1200 cubic yards of concrete were used in the construction of each stage. Stage 6’s elegantly simple façade featured a flat roof-line, Art Deco/ZigZag Moderne motifs, which were in fashion at the time of its construction, and five concrete pilasters extending horizontally along each elevation in a Moderne ornamentation.

While most sound stages were built with a rectangular plan, Stage 6 remains to this day the only stage built as tall as it was narrow, and in a perfect square. At 97 feet tall and 80 feet by 80 feet in width and depth, the reason for its unusual shape is unknown although it may have been conceptualized as an experimental building during one of the most influential eras of technological change in filmmaking.

Stage 6 was unique not only because of its unusual dimensions and attractive architectural style, but because it was constructed to fulfill dual roles, both as a sound stage and a "fly-away” stage, where backdrop scenery could be flown through a “fly gallery” similar to large theatrical stages.