ESS Laboratories ESS 422H Hybrid Headphones with Heil Driver and Air Motion Technology Moving Coil Woofer
$199.00Hybrid Driver Unit: 40mm moving coil driver, 20*30mm multi-fold AMT Air Motion Technology
Impedance 32 Ω +/- 15% at 1KHz, 179Mv
Sensitivity: 110 +/- 3dB at 1KHZ w/Vrms input= 179Mv