Still, several good loudspeaker designs came out of a new engineering effort. In 1975, Bruce Zayde was hired by Bozak and Schlig as technical director; he began by implementing computer-aided design (CAD) as a tool, hosted on an HP 9800 running a COMTRAN program developed by Deane Jensen. Zayde introduced Thiele/Small design principles regarding system development so that loudspeakers could be optimized at the outset for any proposed configuration. The LS-300 became the first Bozak loudspeaker model to be produced wholly from a preconceived design goal. It was also the first Bozak loudspeaker with reflex ports. It was positively reviewed in April 1979, in "High Fidelity".