Dror Harel

Dror Harel(Israel)


His first degree is in Electronic Engineering and his second degree is in Audio + Acoustics. Dror has 36 years of experience in speaker and amplifier design. During the years he has designed and built many sound systems for halls, studios, disco, theatres and stadiums.



Rodger Rapsey

Rodger Rapsey (Australia)


Rodger has been in the sound industry for over 25 years. He was a founding director of The PA People NZ Ltd and then moved to Australia in 1992 to become a director of The PA People Pty Ltd in Sydney. In his position as Sales Director he designed, engineered and project managed a substantial number of installations involving churches, schools, lecture theatres, stadiums, in fact wherever sound reinforcement requirements were necessary.
In 2002 he moved to the Gold Coast to take up the position of General Manager of Bose Professional Products for the Globe where his area of responsibility included product research and development, manufacturing, sales and marketing. During this time Rodger was instrumental in the development of a new and innovative range of products. His experience overseas has given him a wide understanding of the pro audio field and allowed him to develop a network of strong industry-related relationships.

In 2002 Rodger established Sound Choice Pro Audio to distribute professional and commercial products throughout the South Pacific.

Rodger prides himself on the fact that he has an ear to the ground and knows what the current market in his region is asking for in regard to product.  He is passionate about providing appropriate solutions to meet the wide variety of requirements from his clients.



Mark Chmelik

Mark Chmelik (Germany)


Graduate Engineer of Physics, University of Applied Sciences Munich, Germany Mark has worked in the field of speaker design for 15 years. Currently he is working on large installation projects . 4 years ago Mark joined Beta Three as a consultant for speaker development.



Neil Mckean

Neil Mckean (Australia)


Neil has been a keen audio enthusiast for more than 30 years. His obtained a Master of Applied Science in an area of Nuclear Physics and worked extensively in research in the disciplines of electronics, physics and neuroscience. Neil has designed a wide range of digital and analog instrumentation and his knowledge and experience extend to DSP and embedded processing. His current directions include audio A/D and D/A, loudspeaker design and audio DSP interfaces. His recent personal interests include music, historical letters, sports cars and the environment.



Danny Olesh

Danny Olesh (Australia)


Danny has been involved with music and audio practically all his life; from being a performer, an electronics engineer, a touring production and sound engineer, managing retail and distribution channels in the pro audio field as well as designing hardware and writing software. This has given Danny a vast knowledge of the industry and in particular the ability to bring together technologies to achieve new cutting edge products in the professional audio industry.





> KLIPPEL audio test system manufactured in  Germany

> AnechoicChamber

> Precise Laser Video Measuring System

> Speaker Simulation design software-LEAP

> Test software DAAS

> Loudspeaker, speaker test software LMS

> Magnetic circuit design software

> Diaphragm simulation design software