Hifiverse

Headphones — Koss BT221i Bluetooth

Description, images, technical data and specifications

Koss BT221i Bluetooth
Image source — © Koss

these are wireless over—ear headphones with ear clips and an open type - something like the Porta Pro or KSC75, only in the Bluetooth form factor. They are very light and tightly fixed on the ears, ideal for sports, walks and everyday activities.

Specifications

  • Model name

    BT221i Bluetooth

  • Transducer principle

    Dynamic or Isodynamic

  • Scheme

    Closed

  • Wearing style

    Over-ear

  • Frequency response low +/- 10dB (Hz)

    50

  • Frequency response high +/- 10dB (Hz)

    18 000

  • Max. sound pressure level (dBSPL (1 kHz @ 5% THD))

    N/A

  • Connection type

    Wireless

  • Connector (mm)

    N/A

  • Sensitivity (dBSPL (1 kHz/ 1 mW)))

    101

  • Impedance (Ohm (1 kHz))

    N/A

  • Playback time (hours)

    18+

  • Weight (g)

    N/A

  • Official link

    https://koss.com/products/bt221i-bluetooth-ear-clips

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