Yamaha has announced a new portable speaker system it claims to be "the world's most powerful".

Yamaha's NX-U10 USB speaker system is designed for use with computers, mobiles and iPods alike. The system pushes out 20-watts of sound through use of the company's amplification technology that boosts signals carried over USB by a factor of ten.

Yamaha’s SR-Bass technology reproduces deep bass from a slim 33mm body. The company claims bass quality to be equally as good as that found in larger speakers.

The system connects to an audio source using either a USB cable or a 3.5mm input jack. The system is expected to ship by Christmas and will cost £149.