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Koss ESP-9 electrostatic headphones - $100

Koss ESP-9 electrostatic headphones 1 thumbnailKoss ESP-9 electrostatic headphones 2 thumbnail
condition: fair
make / manufacturer: Koss
model name / number: ESP-9
Original Koss ESP-9 electrostatic headphones. In the early 70s these were the reference standard for highend headphones. They must be driven by an amplifier's output, not a headphone jack. Original spring clips for input and speaker output have been modified with 1/4" phone jacks.

post id: 7745325843

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