Visor-mount: Supertooth HD Voice

Best price: £41.99

We felt hampered by the Supertooth HD Voice’s tricky menu navigation in our previous group test, and it’s the same story this time. Usefully for iPhone owners, it has support for Siri, Apple’s voice control set-up, although users of other smartphones may struggle to get to grips with this as quickly as rival systems. Clever mounting options gave it a boost, but the average sound quality left us wanting more.