This month marks the 50th anniversary of audio-visual giant Electrosonic's founding.

In 1964 the company started with two rooms in London's Greenwich vegetable market. Five decades later, Electrosonic is an international, multi-million dollar business with headquarters in Burbank, California, and offices worldwide.

Founded by Denis Naisbitt, Michael Ray and Robert Simpson, the company opened with the strapline 'Electronic Control and Audio Systems'.

From the start, Electrosonic combined the manufacturing and selling of products with the building of complete engineered systems.

Key product categories included electronic lighting control, multi-image slide projection and videowalls.

The product and systems portions of the business continued together through 2010 when the products side of the business, which by then represented a small portion of overall revenue, was sold.

"The 50-year anniversary marks an important milestone for the company as we look back on our incredible heritage of talent and accomplishments," said Jim Bowie, president of Electrosonic Group.

"Electrosonic is continually investing in new generations of talented staff through mentoring and education as we continue to push the limits of what audio-visual technology can do.

"A key element of Electrosonic's success, and one that we are very proud of, is our long and enduring relationship with designers, suppliers and customers."