Brilliant stuff there! I have a couple of Bush Arena items; a turntable which is a rebadged Thorens mounted to a motorboard that carries the Arena name right by the Rank-Bush-Murphy gong icon and an integrated amplifier which was made in house by Bush in their Plymouth factory shortly before Rank bought the rights to use the Bush and Murphy names. These later ones like yours were all built into polystyrene cabinets rather than the wood used in the previous models that carried the Arena brand (Arena was to Bush as Lexus was to Toyota), but fortunately as you've found with that one, the component quality remained surprisingly high, a bit like finding that the Corolla you just bought from a dodgy 1980s bombsite horse trader had a Lexus V8 and all the trimmings hidden under its bunnet. A Q-box, I like that idea!
