Koss ESP-7 specifications

Brand: Koss

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• Type: electrostatic headphone
• Drive units:
• Impedance: 8Ω
• Frequency Response: 30Hz to 15kHz
• Input:
• Maximum SPL:
• Distortion: 0.25%
• Cord length: 1800mm
• Weight: 17 ozs
• Price:
• Year: 1969