Hidden away in Huntingdonshire is a business that has just attracted investment from five world-famous billionaires. Meridian Audio, which makes high-end hi-fi and cinema systems, is the sort of firm that would have the Dragons' Den investors fighting for some shares. Business Editor IAN MacKELLAR discovers more about one of the world's best audio companies THE Ferrari F80 never got off the starting grid at Monza. But it sounds sweeter than any V-12 engine, even to a motor-racing fanatic's ear, and its fuel consumption has environmentalists swooning. Of course, it's not a racing car at all. It's a radio and CD player. But it is one of Huntingdonshire's best-kept secrets. This is another: many of the world's richest people buy their hi-fi and cinema systems from Huntingdon - because they are among the best in the world. They may be seriously expensive, but they still represent good value for money, if you can afford it, and the equipment lasts long after some of the peripheral technology does. Meridian Audio has been manufacturing hand-built top-end equipment since the company was founded by two young engineers in St Ives 30 years ago. Yet it is only recently that they realised that they could at least quadruple turnover in five years. But, like the Ferrari deal, that opportunity came looking for them. To some extent Meridian is a microcosm of Huntingdonshire's cutting-edge business - great product, low profile. It is one of dozens of examples. Pursuit Dynamics, little more than a decent stone's throw away from Meridian's Latham Road headquarters, is another. Pursuit Dynamics was last year's Hunts Post Huntingdonshire Business of the Year. It is at the cutting edge of fluid-dynamics technology for the brewing and other industries. Few people had heard of it before it won the award. But all that is set to change for Meridian, which was in the vanguard of development of both the CD and the DVD. A chance conversation two years ago has led to a multi-national tie-up that should see the Latham Road company expand its business rapidly. And it is good news for the local jobs market, with the firm expecting to add 100 skilled jobs to the current 125-strong workforce.