After reading through some more of the Radio Amateur's Examination Manual, it suddenly struck me that one thing that the digital world has not yet found a solution for is the moving coil loudspeaker!
Rock concerts, lasers amazing special effects right down to the mobile smartphone and iPods... it relies on one thing...the moving coil loudspeaker! They might be huge or small, they all work the same and it is of course analogue and mechanical to produce the audio waves needed to provide us with the entertainment! LED, Plasma and 3D televisions still need a moving coil loudspeaker. Mobile phones and iPods still need moving coil earphones. Can anybody think of an alternative?
Simple!
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