Amazon's Echo seems great, but what does it hear? John Naughton

A few weeks ago, I bought Amazon's latest gizmo – the Echo. It's a voice-activated, networked device equipped with a seven-piece microphone array, which means that it can pick up one's voice from anywhere in its vicinity with impressive accuracy. It comes in two versions, one a 9.25in-tall cylinder that contains a number of speakers, the other a much smaller cylinder that just has tinny speakers. Since the latter was a third of the price of the former, your cheapskate columnist bought that and hooked it up to his hi-fi system, which means that when he speaks to it the Echo replies in sultry female tones modulated by a high-end analogue amplifier and a pair of very fine speakers. Her name, by the way, is "Alexa". I bought it because it seemed to me that it might be a significant product and I have a policy of never writing about kit that I haven't paid for myself.