[10] In 1981, the two Renkus men left Renkus-Heinz to assist Emilar, which was having trouble staying in business.

While Jonas and Algis Renkus were at Emilar, they began using the patented triple lamination method which had been assigned to Renkus-Heinz.

[11] In 1989 Harro's son Ralph D. Heinz joined Renkus-Heinz to work with Don B. Keele, Jr. and Gene Patronis and further his knowledge of electro-acoustics and horn loudspeaker design.

Ralph Heinz eventually became senior vice-president of R&D[12] and patented a method of arraying loudspeakers for better phase coherency in 1994.

[16] In 1999, Harro's daughter Monika Heinz Smetona joined Renkus-Heinz on the administrative team and was named chief operating officer in 2016.