Koss Esp9

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Around 1970, I fell in love with the Koss ESP/9 electrostatic. It was perfect for the Stones, the Dead, the Doors, the Who and Hendrix. It was huge and heavy and expensive, and required a brick-like power supply and its cord was too short; but the sound was overwhelming. The ESP/9 was actually too good for its era, because it was very obvious if an FM station deejay had not cleaned an LP before playing it.