Andrew Jones may well be one of the most successful — and storied — loudspeaker engineers in the history of hi-fi. Jones, who's designed speakers for KEF, Infinity, Pioneer USA, TAD, and now ELAC, takes us through:

The benefits of concentric driver technology,

His approach to enclosure design,

Active vs. passive speakers — and how he's making the former more palatable to audiophiles,

And his take on what makes for really "great sound."

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