$ 0 0 Specs : Cavity material: CNC aluminum alloy Driver: 11mm dual magnetic dual cavity dynamic driver Diaphragm : Planar Glass Composite Diaphragm Sensitivity: 124dB/Vrms(@1kHz) Impedance: 24Ω±15%(@1kHz) Frequency Response Range: 8Hz-21kHz(IEC61094,Free Field) Cable: Oxygen-free copper