Koss Porta Pro alternatives, similar headphones

Hama PC Neckband Headset HS-200
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Hama PC Vibration Headset HS-410
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Hama PC Headset HS-450, USB
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Hama PC Headset HS-500, USB
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Hama PC Headset HS-540, USB
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Hama Gaming Headset "Slide"
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Vivanco SR 140
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Ultron UHS-100
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Ultron UHS-200 Skyper
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Ultron UHS-300 Fun
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Ultron UHS-500 Life
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Koss KEB/24
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Koss KEB/20
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Koss UR/18 Collapsible Stereophone
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Koss UR-21 Home Stereophones
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Koss TD/85
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Koss UR/10
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Koss TM-602 Portable Stereophones
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Koss KPH/15 Portable Stereophones
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Koss KSC-55
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Koss KSC/22
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Koss KTX PRO 1
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Koss KTX/8 Portable Sterophones
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