Turning your mobile into a speaker system might conjure up images of delightful young things blasting out Chipmunk on the top deck of the bus. But that’s not what these neat little numbers, the Proporta Twisted System Portable Speakers, are about. The idea is to let you unleash your tunes when you’re away from home, but still need a hit of your favourite prog rock band. Read our complete Proporta Twisted System Portable Speaker review now to see if they’re up to the job.