Teenage engineering cm-15 £1,049

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Chord Electronics’ Alto doesn’t fit neatly into one of the traditional hi-fi categories. It is an analogue amplifier with four headphone outputs that can all be used at the same time. But, unusually,

Does the ‘Special’ tweak to these cans add enough to justify the price rise?

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Price when reviewed: £499 ★★★★☆ T here are ...