Sony MDR AS21 alternatives, similar headphones

Poly - Plantronics GameCom 780
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Yamaha HPH-200
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Logitech Stereo Headset Chat
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Logitech Stereo Headset H230 for Business
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Hama "Dispersion"
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Panasonic RP-HJE100E-K
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König CMP-HEADSET110
Specifications

König CMP-HEADSET120
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König CMP-HEADSET140
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Sennheiser DW 30 HS
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Sennheiser DW 20 HS
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Sennheiser
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Sony Smart Headset pro MW1
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Sony XBA 1
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Sony XBA 2IP
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Sony XBA BT75
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Sony MK200 Music Lover's Kit
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Sony MDR EX37
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Sony MDR AS41EX
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Sony MDR AS51G
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Sony MDR MA100B
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Sony MDR MA300
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Sony MDR MA500
Specifications

Sony MDR MA900
Specifications