Ltd. (also known as Sonodyne) is an Indian electronics company based in Kolkata, India, founded in the 1970s by Ashoke Mukherjee.

Sales and project offices are located in Mumbai, Bangalore, Delhi and Kolkata.

Around the same time, manufacturing and research was moved to Special Economic Zone, Mumbai.

These solutions are also available in India alon gwith a range of high performance residential audio systems for music and surround sound.

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