Technical/audio career began when had to leave doctoral program at UCLA to fulfill military obligation.  Did this in 2 phases first with the Air Force as General Electric contractor as radar specialist at remote Alaska base.  Transferred in 1968 to GE program with NASA and began using electronics background in computer maintenance on the large mainframes of the time.  Upon completion of military obligation did freelance maintenance for the large recording studios and movie lots such as Fox in the Los Angeles/Hollywood area.  Over the next 25 years became more focused on speaker work and developing own line of speakers.  Met Dr Bruce Edgar in  1998 and developed a  collaboration of his tractrix horns and my field coil drivers. These products were integrated into several high end product lines leading to interest by Brush/Materion in taking their beryllium domes and developing a finished diaphragm for the pro market.  That project was completed by 2011.  Now simi-retired  was talked into again doing a challenging product development by David Dai  leading up to the forming of ESD.  Life member of Audio Engineering Society AES, and Society of Motion Picture and Television Engineers SMPTE.

Jacky Dai is the student of Dr. Edgar and Mr. Saye in speaker theory, design and manufacturing. He developed the R&D prototype of ESD Acoustic with the two masters. 

In 2017, he returned to China helping to found ESD Acoustic. Based on the theory of his two mentors and the progress of modern design software, material science and craftsmanship, he innovatively designed carbon fiber horn &field coil driver units of the next generation. Meanwhile he incorporated Chinese cultural elements into the design as ESD’s brand genetics.