Designs, manufactures and distributes loud-speaker systems for the touring and installed markets (such as theatres, stadia, cinemas, bars and nightclubs) on a worldwide basis.

ISIS funded an MBO from Martin Audio's corporate parent in 2003. The business consistently grew profitably, exceeding the shareholders' objectives until its sale to US-based LOUD Technologies in April 2007, for £17.25m.

"Our partnership with ISIS has been a great success and has assisted the Martin Audio team in over-achieving the objectives that we set ourselves at the time of the buy out." David Bissett-Powell, CEO, 2007.

Timeline:

- 2003 ISIS funds MBO

- 2007 Loud Technologies acquires Martin Audio