Complex sentence: Marshall Amplification was founded as a British company, founded by drum shop owner and drummer Jim Marshall, that designs and manufactures music amplifiers, brands personal headphones/earphones (made by Zound Industries), and, after acquiring Natal Drums, drums and bongos.
Split into simpler sentences: Marshall Amplification was founded as a British company by drum shop owner and drummer Jim Marshall. The company designs and manufactures music amplifiers, brands personal headphones/earphones (made by Zound Industries), and, having acquired Natal Drums, drums and bongos.