How loud is too loud?

When it comes to audio equipment, most of the world's loudspeakers are made in the US, Asia or Europe, but one entrepreneur in Nigeria has seen a gap in the market.

Utibe Okuk realised there was a huge demand for loudspeakers from the country's churches and other businesses so he set up Megawatts Audio, but running his business comes with challenges.

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BBC News
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Business