Laptop speakers are always been not so comfortable for lots of users. Simply it lacks quality. Even though lot of innovations has come and companied claiming to give you great quality sound output most cases it has been a failure. The output of most laptop when it comes sound is of bad quality, improper output, and dissolved sound with disturbance.But the good news is soon, now music lovers can use plug-in USB speakers which will produce high-quality sound from the laptop but the best point is it works without main power. NXT of Cambourne, a British firm brings you USB-powered system which will deliver up to 15 watts for each speaker, reports New Scientist. The USB 2.0 port can deliver no more than 5.25 volts to a device compared to main power units commonly used 32 volts.

James Lewis chief executive of NXT says that most of the time music is quiet enough to be reproduced satisfactorily by circuits running at just 1 volt. So NXT has built its low voltage consuming USB-powered amplifier which will run in low voltages, but able to deliver higher voltages – and more power to the speakers which here is done by tapping a pair of capacitors that store spare power from the USB during quiet passages. The unit determines when is the exact time to raise the voltage and unleash the stored power by pre-determining the music signal a couple of milliseconds ahead of the amplifier,

Andy Dowell, a director of Dolby Laboratories in the UK says “It’s the first time I’ve heard of using the dynamic reallocation of power for this type of application. It seems like a great idea”.