ELFINEAR CarbonCore 50mm Hi-Fi Headphone Speaker Driver: Pen Composite Carbon Diaphragm + PU Surround, Dual 64Ω/300Ω

ELFINEAR CarbonCore 50mm Hi-Fi Headphone Speaker Driver: Pen Composite Carbon Diaphragm + PU Surround, Dual 64Ω/300Ω

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