Sennheiser HD 420 specifications

Brand: Sennheiser

• Type: dynamic headphone
• Drive units:
• Impedance:
• Frequency Response: 18Hz to 20kHz
• Input: 100mW (nominal)
• Maximum SPL: 94dB
• Distortion: 1%
• Cord length: 3000mm
• Weight: 129g
• Price:
• Year: 1979