In this interview filmed at Dezeen Space, London designer Paul Cocksedge explains the ideas behind Change the Record, a project where vinyl records are moulded into amplifiers for smartphones.

The speakers were created in front of an audience last week in a live performance with Dezeen and Concrete at Pizza East in Shoreditch, London.

See a movie of the amplifier in action | See more about the project on Dezeen | See more stories about Paul Cocksedge | More about the London Design Festival 2011